Metal 3D printing device and working method thereof

Abstract

The present invention discloses a metal 3D printing device and a working method thereof, which relates to the technical field of metal 3D printing, and aims to optimize the technical problems of waste and pollution in metal powder printing, including a body component; the body component has a long axis structure inside, wherein a metal printing powder conveying device is arranged on one side of the outer wall of the body component; and a plurality of lifting and adjusting components are arranged inside the body component. The present invention can adjust the plane state and the cone state of the platform component through the deformation setting of the platform component, realize the printing of conventional complex metal parts through the adjustment of the plane state, realize the replacement filling of metal powder in the printing process of partial connection through the adjustment of the cone state, effectively reduce the use of printed metal powder, thereby effectively reducing the waste and pollution of metal powder, and effectively improving the functionality of the metal 3D printing device.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D printing, and more specifically, to a metal 3D printing device and a working method thereof. Background Art

[0002] Metal 3D printing equipment, also known as metal additive manufacturing equipment, mainly creates complex metal parts and components by stacking metal materials layer by layer. Such equipment usually includes the following key components:

[0003] Printing platform: As the support for metal powder and the basis for layer-by-layer construction, the printing platform will descend layer by layer during the printing process to lay a new layer of metal powder. Powder supply system: Responsible for transporting metal powder to the printing area. This usually includes a powder storage bin, a powder control mechanism, and a powder spreading mechanism. The powder spreading mechanism may adopt a rake structure, a roller structure or other special designs to ensure that the powder is evenly laid. Energy source: such as a laser beam or an electron beam, which is used to melt the metal powder to form a solid metal layer. These energy sources melt the powder layer by layer according to the preset three-dimensional model under precise control. Monitoring system: Including infrared thermal imaging detection devices, etc., used to monitor temperature changes during the printing process in real time to ensure printing quality.

[0004] In the 3D metal printing process, the following types of parts usually require the assistance of support structures:

[0005] 1. Parts with complex suspended structures Parts with cantilevered parts, such as some special connectors in mechanical parts, are connected to the main structure at one end and cantilevered a large distance at the other end. During the printing process, if there is no support, the cantilevered part is easy to deform or even collapse under the action of gravity. Some creatively designed decorations may have protruding and uniquely shaped cantilevered parts, which also require support structures to ensure the success of printing. Parts with internal suspended structures, such as parts with complex inner cavities, may have some small suspended structures inside. For example, some special valve parts have small protrusions or grooves inside. These suspended structures need support during printing, otherwise they cannot be formed. Some artistic hollow sculptures, the complex hollow parts inside are also inseparable from the assistance of support structures.

[0006] 2. Parts with large-angle inclined structures Thin-walled parts with large inclination angles, such as some thin-walled structural parts in the aerospace field, may have large inclination angles due to their design requirements. Without support, the thin-walled part is easy to deform during the printing process, affecting the accuracy and strength of the part. Some daily necessities such as lampshades with special shapes may also have thin-walled parts with large inclinations, which require support structures to ensure printing quality. Parts with complex shapes with inclined surfaces, such as some irregularly shaped automotive parts, may have multiple inclined surfaces at different angles on the surface. If these inclined surfaces are not supported during printing, they are prone to collapse or deformation, affecting the performance and appearance of the parts. Some creatively designed crafts, such as ornaments with unique inclined shapes, also require support structures to achieve printing.

[0007] 3. Hollow and complex parts Hollow shaft parts Various hollow shaft parts such as transmission shafts and gear shafts in the industry require internal support structures to ensure the shape and dimensional accuracy of the hollow parts during 3D printing. Some specially designed hollow shafts may also have complex structures such as keyways and splines, and these parts need the assistance of support structures. Complex hollow shell parts, such as the shells of some instruments and meters, are designed into complex hollow shell structures in order to reduce weight and meet specific functional requirements. During the printing process, both the inner and outer walls of the shell may require support structures to prevent deformation. The shells of some high-end electronic products may also adopt complex hollow structure designs, which require support structures to ensure molding quality during printing.

[0008] Existing metal 3D printing equipment mostly performs printing operations through an auxiliary platform with a planar structure. The existing method is to print with axial space and the need to print support structures through the flattening of powder, which leads to excessive waste of printing metal powder, which not only easily leads to metal powder pollution, but also the use of support structures further uses part of the metal powder. In view of this, we propose a metal 3D printing device and a working method thereof. Summary of the invention

[0009] The purpose of the present invention is to provide a metal 3D printing device and a working method thereof to optimize the technical problems of waste and pollution in metal powder printing.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a metal 3D printing device, comprising a body component; the interior of the body component is a long axis structure, wherein a metal printing powder conveying device is arranged on one side of the outer wall of the body component; and a plurality of lifting and adjusting components are arranged inside the body component, and guide columns are arranged on both sides of the lifting and adjusting components; and the guide columns are lifted and slidably matched with the lifting and lowering ends of the lifting and lowering adjustment components; a laser printing component, a material laying component and a platform component are arranged in sequence from top to bottom inside the body component; the laser printing component is connected to the lifting and lowering end of the lifting and lowering adjustment component through a swing connecting rod; the platform component is arranged at the lower part of the body component, and the platform component is fixedly connected to the guide columns; the material laying component is arranged inside the body component through a macro lifting push rod.

[0011] The present invention can adjust the plane state and the cone state of the platform component through the deformation setting of the platform component. The printing requirements of conventional complex metal parts can be realized through the adjustment of the plane state, and the substitute filling of metal powder in the printing process of partial connection can be realized through the adjustment of the cone state, which effectively reduces the use of printed metal powder, thereby effectively reducing the waste and pollution of metal powder, and effectively improving the functionality of the metal 3D printing equipment.

[0012] Preferably, the lifting and lowering adjustment component includes a plurality of synchronous wheels A arranged at the upper end of the body component; a synchronous wheel B is arranged at the lower end of the body component relative to the synchronous wheel A, and an auxiliary servo motor is arranged on one side of the synchronous wheel B; and the synchronous wheel A is connected to the synchronous wheel B through a synchronous belt transmission, wherein a guide seat is fixedly arranged on the synchronous belt.

[0013] Preferably, the laser printing assembly comprises a mounting base; a hinged joint hingedly connected to the swing link is arranged on a side of the mounting base; and a 3D metal printing laser head assembly is arranged at the bottom of the mounting base.

[0014] Preferably, the platform assembly includes a basic connection platform; a plane groove is arranged in a stepped shape inside the basic connection platform; a storage bin is arranged inside the basic connection platform; a fixed spiral support roll is arranged at the open end of the storage bin, wherein the end of the fixed spiral support roll is fixedly connected to the storage bin; an auxiliary connection frame is arranged at the bottom of the basic connection platform, a driving motor is arranged on the auxiliary connection frame, and a synchronous wheel C is arranged at the output end of the driving motor; a synchronous wheel shaft D is rotatably arranged on the auxiliary connection frame through a bearing seat, and the synchronous wheel shaft D is connected to the synchronous wheel C through a synchronous belt transmission; a driving cylinder is arranged on one side of the synchronous wheel shaft D, and a rotating seat is arranged at the end of the driving cylinder; a connecting drive shaft is arranged on the rotating seat at a coaxial position relative to the synchronous wheel shaft D; a receiving groove is arranged at the high end of the connecting drive shaft, which is hooked with the end of the fixed spiral support roll; wherein, the connecting drive shaft is key-connected with the synchronous wheel shaft D, and a filling compensation block which is wide at the top and narrow at the bottom is arranged at the end of the connecting drive shaft.

[0015] Preferably, the driving cylinder stroke drives the rotating seat and the connecting driving shaft to move downward, so that the fixed spiral support roll is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block is located in the same plane as the top of the fixed spiral support roll, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connecting driving shaft to make positive rotational movement, so that the fixed spiral support roll is tightly fitted with the basic connecting carrier to form a sealed horizontal printing surface structure.

[0016] Preferably, the driving cylinder stroke drives the rotating seat and the connecting driving shaft to move downward, so that the fixed spiral support roll is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block is located in the same plane as the top of the fixed spiral support roll, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connecting driving shaft to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll forms a flat spiral material discharge cavity and constitutes an integrated material return structure with the storage bin.

[0017] Preferably, the return stroke of the driving cylinder drives the rotating seat and the connected driving shaft to move upward, so that the fixed spiral support roll is adjusted from a flat spiral state to a conical state, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connected driving shaft to make a positive rotational movement, so that the fixed spiral support roll is tightly fitted locally along the spiral surface to form a powder use replacement structure and / or a printing support replacement structure for metal parts with axial channel components and / or printing support structures.

[0018] Preferably, the return stroke of the driving cylinder drives the rotating seat and the connecting driving shaft to move upward, so that the fixed spiral support roll is adjusted from a flat spiral state to a conical state, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connecting driving shaft to rotate in the opposite direction, so that the interior of the fixed spiral support roll is tightened to form a stripping structure with metal parts of the printing support structure.

[0019] Preferably, the paving assembly includes a rotating frame arranged above the basic connecting platform; a rotating disk A is arranged inside the rotating frame; limiting grooves are arranged in a circular shape with equal intervals on the surface of the rotating disk A; a plurality of scraping and sweeping paving blocks are arranged on the upper end of the rotating disk A, and a rotating disk B is arranged above the scraping and sweeping paving blocks, and a plurality of extrusion grooves are arranged in a circular shape with equal intervals on the surface of the rotating disk B; wherein, force-bearing protrusions are respectively arranged on both sides of the scraping and sweeping paving blocks; and driving gears are meshed on the sides of the rotating disk A and the rotating disk B, and the driving gears are connected by a servo motor; a notch is arranged on one side of the tip of the scraping and sweeping paving block, and an auxiliary channel is arranged inside the notch.

[0020] A working method of a metal 3D printing device comprises the following steps:

[0021] S100, adaptation and adjustment processing:

[0022] S101, if the adaptable parts with hollow shafts and supporting structures are adapted and adjusted; the rotating seat and the connecting drive shaft are driven to move upward by the return stroke of the driving cylinder, so that the fixed spiral support roll is adjusted to a conical state, and the synchronous wheel C is driven by the driving motor to drive the synchronous belt to drive the synchronous wheel shaft D and the connecting drive shaft to make positive rotational movement, so that the fixed spiral support roll is tightly fitted along the spiral surface locally, and the material discharge cavity is blocked in this way, and the required axial space is filled by the required appropriate return stroke of the driving cylinder;

[0023] S102, if the unsuitable metal parts are adapted and adjusted; the fixed spiral support roll is compressed as a whole to a flat spiral state by driving the cylinder stroke, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connecting drive shaft to make a positive rotation movement, so that the fixed spiral support roll is closely fitted;

[0024] S200, printing process: a proper amount of metal powder is scattered onto the platform component through the metal printing powder conveying device; and a plurality of lifting and adjusting components are independently controlled to perform lifting and adjusting, so as to adjust the laser printing component as a whole at multiple angles and positions, and realize the printing operation after the angle adjustment;

[0025] S300, paving process: the servo motor located on one side of the rotating disk B drives the driving gear to rotate the rotating disk B, and the force-bearing protrusion at one side is squeezed through the extrusion groove, so that the scraping and paving block rotates and slides while adjusting, and in this way, the metal powder is scraped and leveled on the side of the fixed spiral support roll in different height cone states. At the same time, after the above adjustment, the two servo motors can be synchronously driven to cause the rotating disk A and the rotating disk B to rotate synchronously, and the powder is fully swept by the scraping and paving block through the synchronous rotation, and then the printing process of step S200 is repeated, and the printing is completed by repeated operations;

[0026] S400, stripping process: based on the cone state of spiral bonding of the fixed spiral support roll, the synchronous wheel C is driven by the driving motor to drive the synchronous belt to drive the synchronous wheel shaft D and the connecting drive shaft to rotate in the opposite direction, so that the fixed spiral support roll is partially contracted inward in sequence, so that the fixed spiral support roll is separated from the local support structure of metal printing, and then the basic connection carrier is separated by a tool;

[0027] S500, material return processing: by driving the cylinder stroke to work, the fixed spiral support roll is compressed as a whole to a flat spiral state, and the driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and connects the driving shaft to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll forms a flat spiral material discharge cavity, and the servo motor located on one side of the rotating disk B drives the driving gear to rotate the rotating disk B, and the force-bearing protrusion on one side is squeezed through the extrusion groove, so that the scraping and paving block rotates and slides while adjusting, so that the metal powder can be scraped and leveled on the sides of the fixed spiral support rolls in different height cone states. At the same time, after the above adjustment, the two servo motors can be driven synchronously to cause the rotating disk A and the rotating disk B to rotate synchronously. After the synchronous rotation, the scraping and paving block is used to fully sweep the powder, and then the metal printed powder can be collected into the storage bin.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can adjust the plane state and the cone state of the platform component through the deformation setting of the platform component. The printing requirements of conventional complex metal parts can be achieved through the adjustment of the plane state. The replacement filling of metal powder in the printing process of partial connection can be achieved through the adjustment of the cone state, which effectively reduces the use of printed metal powder, thereby effectively reducing the waste and pollution of metal powder, and effectively improving the functionality of the metal 3D printing equipment.

[0030] 2. The present invention drives the cylinder stroke to compress the fixed spiral support roll as a whole into a flat spiral state, and cooperates with the driving motor to drive the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and connects the driving shaft to make positive rotational motion, so that the fixed spiral support roll fits tightly. In this way, an auxiliary platform similar to a conventional planar structure is formed to perform printing operations, so as to adapt to the processing requirements that the adjusted conical state platform component cannot perform.

[0031] 3. The present invention works by driving the cylinder stroke, so that the fixed spiral support roll is compressed as a whole to a flat spiral state, and cooperates with the driving motor to drive the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and connects the driving shaft to make reverse rotation, so that the internal gap of the fixed spiral support roll forms a flat spiral feeding cavity. With the cooperation of the laying component, the metal powder after printing can be collected into the storage bin, which effectively facilitates the recovery and collection operation of the metal powder.

[0032] 4. The present invention drives the rotating seat and the connected driving shaft to move upward by driving the cylinder return stroke, so that the fixed spiral support roll is adjusted to a conical state, and drives the synchronous wheel C by driving the motor to drive the synchronous belt to drive the synchronous wheel shaft D and the connected driving shaft to make positive rotational movement, so that the fixed spiral support roll is tightly fitted along the spiral surface locally. In this way, the feeding cavity is blocked, and at the same time, the required axial space filling is coordinated with the required appropriate driving cylinder return stroke, and the conical fixed spiral support roll is used to replace the axial filling space and the supporting parts during printing.

[0033] 5. The present invention is based on the conical state of the spiral fitting of the fixed spiral support roll. The driving motor drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D and the connected driving shaft to make reverse rotational movement, causing the fixed spiral support roll to partially shrink inward in sequence, so that the fixed spiral support roll is separated from the local support structure of metal printing. This method effectively improves the effect of the fixed spiral support roll and the local support structure of metal printing by partially separating them in sequence, which facilitates the removal operation of parts after metal printing.

[0034] 6. The present invention drives the driving gear through a servo motor located on one side of the rotating disk B to rotate the rotating disk B, and squeezes the force-bearing protrusion on one side through the extrusion groove, so that the scraping and paving block rotates and slides and adjusts at the same time. In this way, the metal powder scraping and leveling work of the edges of the fixed spiral support rolls in different height cone states is achieved. At the same time, after the above-mentioned adjustment, the two servo motors can be synchronously driven to cause the rotating disk A and the rotating disk B to rotate synchronously, and the synchronous rotation can be used to fully sweep the powder through the scraping and paving block. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the body component of the present invention.

[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of the paving assembly and the platform assembly of the present invention.

[0038] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the basic connection platform of the present invention.

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the platform component of the present invention.

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the fixed spiral support coil of the present invention.

[0041] Figure 7 It is a front view structural schematic diagram of the connecting drive shaft of the present invention.

[0042] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the paving assembly of the present invention.

[0043] Fig. 9 It is a schematic diagram of the disassembled three-dimensional structure of the paving component of the present invention.

[0044] Fig.10 It is a schematic diagram of the three-dimensional structure of the scraping and paving block of the present invention.

[0045] Fig.11 For the present invention Figure 2 The partially enlarged structural schematic diagram at A in the middle shows the structure of the laser printing component and its connection relationship with the swing connecting rod.

[0046] Description of the numbers in the figure:

[0047] 1. Machine body assembly; 2. Lifting and adjusting assembly; 3. Laser printing assembly; 4. Material laying assembly; 5. Platform assembly; 6. Guide column; 7. Macro lifting push rod; 9. Swing connecting rod;

[0048] 201, synchronous wheel A; 202, synchronous wheel B; 203, auxiliary servo motor; 204, synchronous belt; 205, guide seat;

[0049] 301, mounting base; 3011, hinged joint; 302, 3D metal printing laser head assembly;

[0050] 401, rotating frame; 402, rotating disk A; 4021, limiting groove; 403, scraping and paving block; 4031, force-bearing protrusion; 4032, auxiliary channel; 404, rotating disk B; 4041, extrusion groove; 405, driving gear; 406, servo motor;

[0051] 501, basic connection platform; 5011, plane groove; 5012, storage bin; 502, fixed spiral support roll; 503, auxiliary connection frame; 504, driving motor; 505, synchronous wheel shaft D; 506, driving cylinder; 5061, rotating seat; 507, connecting driving shaft; 5071, containing groove; 5072, filling compensation block. DETAILED DESCRIPTION

[0052] like Figures 1 to 11 As shown, the present invention relates to a metal 3D printing device, including a body component 1; the interior of the body component 1 is a long axis structure, wherein a metal printing powder conveying device is arranged on one side of the outer wall of the body component 1; and, a plurality of lifting and adjusting components 2 are arranged inside the body component 1, and guide columns 6 are arranged on both sides of the lifting and adjusting components 2; and the guide columns 6 are lifted and slidably matched with the lifting and lowering ends of the lifting and lowering adjusting components 2; a laser printing component 3, a material laying component 4 and a platform component 5 are arranged in sequence inside the body component 1 from top to bottom; the laser printing component 3 is connected to the lifting and lowering end of the lifting and lowering adjusting component 2 through a swing connecting rod 9; the platform component 5 is arranged at the lower part of the body component 1, and the platform component 5 is fixedly connected to the guide columns 6; the material laying component 4 is arranged inside the body component 1 through a macro lifting push rod 7. The present invention can adjust the plane state and the cone state of the platform component 5 through the deformation setting of the platform component 5. The printing requirements of conventional complex metal parts can be achieved through the adjustment of the plane state, and the substitute filling of metal powder in the printing process of partial connection can be achieved through the adjustment of the cone state, which effectively reduces the use of printed metal powder, thereby effectively reducing the waste and pollution of metal powder, and effectively improving the functionality of the metal 3D printing equipment.

[0053] In the embodiment of the present invention, the lifting and adjusting assembly 2 includes a plurality of synchronous wheels A201 arranged at the upper end of the body assembly 1; a synchronous wheel B202 is arranged at the lower end of the body assembly 1 relative to the synchronous wheel A201, and an auxiliary servo motor 203 is arranged on one side of the synchronous wheel B202; and the synchronous wheel A201 and the synchronous wheel B202 are connected by a synchronous belt 204, wherein a guide seat 205 is fixedly arranged on the synchronous belt 204. The present invention independently controls a plurality of lifting and adjusting assemblies 2 to perform lifting and adjusting, thereby adjusting the laser printing assembly 3 as a whole in multiple angles and directions, and realizing angle adjustment based on the required printing operation.

[0054] In an embodiment of the present invention, the laser printing assembly 3 includes a mounting base 301 ; a hinge joint 3011 hingedly connected to the swing link 9 is arranged on the side of the mounting base 301 ; and a 3D metal printing laser head assembly 302 is arranged at the bottom of the mounting base 301 .

[0055] In the embodiment of the present invention, the platform component 5 includes a basic connection platform 501; the basic connection platform 501 has a plane groove 5011 arranged in a stepped manner inside; a storage bin 5012 is arranged inside the basic connection platform 501; a fixed spiral support roll 502 is arranged at the open end of the storage bin 5012, wherein the end of the fixed spiral support roll 502 is fixedly connected to the storage bin 5012; an auxiliary connection frame 503 is arranged at the bottom of the basic connection platform 501, a driving motor 504 is arranged on the auxiliary connection frame 503, and a synchronous wheel C is arranged at the output end of the driving motor 504; the auxiliary connection frame 503 is connected to the storage bin 5012 by a bearing seat A synchronous axle D505 is provided for rotation, and the synchronous axle D505 is connected to the synchronous wheel C through a synchronous belt drive; a driving cylinder 506 is provided on one side of the synchronous axle D505, and a rotating seat 5061 is provided at the end of the driving cylinder 506; a connecting drive shaft 507 is provided on the rotating seat 5061 at a coaxial position relative to the synchronous axle D505; a receiving groove 5071 is provided at the high end of the connecting drive shaft 507 to be hooked with the end of the fixed spiral support roll 502; wherein, the connecting drive shaft 507 is key-connected to the synchronous axle D505, and a filling compensation block 5072 which is wide at the top and narrow at the bottom is provided at the end of the connecting drive shaft 507. Figure 6 The fixed spiral support roll 502 shown has a notch in the middle after being spirally attached in a plane, which is adapted to the filling compensation block 5072.

[0056] In an embodiment of the present invention, the driving cylinder 506 stroke drives the rotating seat 5061 and the connecting drive shaft 507 to move downward, so that the fixed spiral support roll 502 is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block 5072 is located in the same plane as the top of the fixed spiral support roll 502, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to perform positive rotation movement, so that the fixed spiral support roll 502 is tightly fitted with the base connection carrier 501 to form a sealed horizontal printing surface structure. The present invention drives the cylinder 506 to work by stroke, so that the fixed spiral support roll 502 is compressed as a whole to a flat spiral state, and cooperates with the drive motor 504 to drive the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to perform positive rotational motion, so that the fixed spiral support roll 502 is tightly fitted. In this way, an auxiliary platform similar to a conventional planar structure is formed to perform printing operations, so as to adapt to the processing requirements that the adjusted conical state platform component 5 cannot perform.

[0057] In an embodiment of the present invention, the driving cylinder 506 stroke drives the rotating seat 5061 and the connecting drive shaft 507 to move downward, so that the fixed spiral support roll 502 is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block 5072 is located in the same plane as the top of the fixed spiral support roll 502, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll 502 forms a flat spiral material discharge cavity and the storage bin 5012 constitutes an integrated material return structure. The present invention drives the cylinder 506 to work by stroke, so that the fixed spiral support roll 502 is compressed as a whole to a flat spiral state, and cooperates with the drive motor 504 to drive the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to perform reverse rotation, so that the internal gap of the fixed spiral support roll 502 forms a flat spiral feeding cavity. With the cooperation of the laying component 4, the metal powder after printing can be collected into the storage bin 5012, which effectively facilitates the recovery and collection operation of the metal powder.

[0058] In an embodiment of the present invention, the driving cylinder 506 returns to drive the rotating seat 5061 and the connecting drive shaft 507 to move upward, causing the fixed spiral support roll 502 to adjust from a planar spiral state to a conical state, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to make a positive rotational movement, causing the fixed spiral support roll 502 to fit tightly along the spiral surface locally to form a powder use replacement structure and / or a printing support replacement structure for metal parts having an axial channel component and / or a printing support structure. The present invention drives the rotating seat 5061 and the connecting driving shaft 507 to move upward by driving the cylinder 506 in the return stroke, so that the fixed spiral support roll 502 is adjusted to a conical state, and drives the synchronous wheel C through the driving motor 504 to make the synchronous belt drive the synchronous wheel shaft D505 and the connecting driving shaft 507 to make positive rotational movement, so that the fixed spiral support roll 502 is tightly fitted along the spiral surface locally, and the material discharge cavity is blocked in this way. At the same time, the required axial space filling is coordinated with the required appropriate driving cylinder 506 return stroke, and the conical fixed spiral support roll 502 is used to replace the axial filling space and the supporting components during printing.

[0059] In an embodiment of the present invention, the driving cylinder 506 drives the rotating seat 5061 and the connecting drive shaft 507 to move upward in the return stroke, so that the fixed spiral support roll 502 is adjusted from the plane spiral state to the cone state, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to rotate in the opposite direction, so that the fixed spiral support roll 502 is tightened inside to form a stripping structure of the metal parts with the printing support structure. The present invention is based on the cone state of the spiral bonding of the fixed spiral support roll 502. The driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to rotate in the opposite direction, so that the fixed spiral support roll 502 is partially contracted inward in sequence, so that the fixed spiral support roll 502 is separated from the local support structure of the metal printing. This method effectively improves the effect of the fixed spiral support roll 502 and the local support structure of the metal printing through the partial sequential separation method, which is convenient for the parts after the metal printing to be removed.

[0060] In an embodiment of the present invention, the paving assembly 4 includes a rotating frame 401 arranged above the basic connecting platform 501; a rotating disk A402 is arranged inside the rotating frame 401; the surface of the rotating disk A402 is provided with limiting grooves 4021 in a circular shape with equal intervals; a plurality of scraping and sweeping paving blocks 403 are arranged on the upper end of the rotating disk A402, and a rotating disk B404 is arranged above the scraping and sweeping paving blocks 403, and a plurality of extrusion grooves 4041 are arranged in a circular shape with equal intervals on the surface of the rotating disk B404; wherein, force-bearing protrusions 4031 are respectively arranged on both sides of the scraping and sweeping paving blocks 403; and, driving gears 405 are meshedly arranged on the sides of the rotating disk A402 and the rotating disk B404, and the driving gears 405 are connected and driven by a servo motor 406; a notch is arranged on one side of the tip of the scraping and sweeping paving block 403, and an auxiliary channel 4032 is arranged inside the notch. The present invention drives the driving gear 405 through the servo motor 406 located on one side of the rotating disk B404 to rotate the rotating disk B404, and squeezes the force-bearing protrusion 4031 on one side through the extrusion groove 4041, so that the scraping and spreading block 403 rotates and slides while adjusting. In this way, the metal powder is scraped and leveled on the side of the fixed spiral support roll 502 in different height cone states. At the same time, after the above-mentioned adjustment, the two servo motors 406 can be synchronously driven to cause the rotating disk A402 and the rotating disk B404 to rotate synchronously, and the scraping and spreading block 403 can be fully swept by the synchronous rotation.

[0061] Working principle: This embodiment provides a working method of a metal 3D printing device, using the following steps:

[0062] S100, adaptation and adjustment processing:

[0063] S101, if the adaptable parts with hollow shafts and supporting structures are adapted and adjusted; the rotating seat 5061 is driven by the return stroke of the driving cylinder 506, and the connecting driving shaft 507 is moved upward, so that the fixed spiral support roll 502 is adjusted to a conical state, and the synchronous wheel C is driven by the driving motor 504 so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting driving shaft 507 to rotate forward, so that the fixed spiral support roll 502 is closely fitted along the spiral surface locally, and the material discharge cavity is blocked in this way, and at the same time, the required axial space is filled by the required appropriate return stroke of the driving cylinder 506;

[0064] S102, if the unsuitable metal parts are adapted and adjusted; the fixed spiral support roll 502 is compressed to a flat spiral state as a whole by driving the cylinder 506 to work, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to rotate in the positive direction, so that the fixed spiral support roll 502 is closely fitted;

[0065] S200, printing process: a proper amount of metal powder is scattered onto the platform component 5 through the metal printing powder conveying device; and the lifting and lowering adjustment is performed by independently controlling the plurality of lifting and lowering adjustment components 2, so as to adjust the laser printing component 3 as a whole at multiple angles and positions, and realize the printing operation after the angle adjustment;

[0066] S300, paving process: the servo motor 406 located on one side of the rotating disk B404 drives the driving gear 405 to rotate the rotating disk B404, and the force-bearing protrusion 4031 on one side is squeezed through the extrusion groove 4041, so that the scraping and paving block 403 rotates and slides while adjusting, and in this way, the metal powder is scraped and leveled on the side of the fixed spiral support roll 502 in different height cone states. At the same time, after the above adjustment, the two servo motors 406 can be synchronously driven to cause the rotating disk A402 and the rotating disk B404 to rotate synchronously, and the powder is fully swept by the scraping and paving block 403 through the synchronous rotation, and then the printing process of step S200 is repeated, and the printing is completed by repeated operations;

[0067] S400, stripping process: Based on the spirally attached cone state of the fixed spiral support roll 502, the synchronous wheel C is driven by the driving motor 504 so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting driving shaft 507 to rotate in the opposite direction, so that the fixed spiral support roll 502 is partially contracted inward in sequence, so that the fixed spiral support roll 502 is separated from the local support structure of the metal printing, and then the basic connection carrier 501 is connected and separated by a tool;

[0068] S500, material return processing: by driving the cylinder 506 to work, the fixed spiral support roll 502 is compressed as a whole to a flat spiral state, and the driving motor 504 drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D505 and the connecting drive shaft 507 to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll 502 forms a flat spiral material discharge cavity, and the servo motor 406 located on one side of the rotating disk B404 drives the driving gear 405 to rotate the rotating disk B404, and squeezes the material through the extrusion groove 4041. The force-bearing protrusion 4031 on one side causes the scraping and spreading block 403 to rotate and slide at the same time, so that the metal powder can be scraped and leveled on the sides of the fixed spiral support roll 502 in different height cone states. At the same time, after the above adjustment, the two servo motors 406 can be driven synchronously to cause the rotating disk A402 and the rotating disk B404 to rotate synchronously. After the scraping and spreading block 403 is fully swept by the synchronous rotation, the powder after metal printing can be collected in the storage bin 5012.

[0069] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A metal 3D printing device, characterized in that: It comprises a machine body component (1); the interior of the machine body component (1) is a long-axis structure, wherein a metal printing powder conveying device is provided on one side of the outer wall of the machine body component (1); Furthermore, a plurality of lifting and adjusting components (2) are arranged inside the body component (1), and guide columns (6) are arranged on both sides of the lifting and adjusting components (2); and the guide columns (6) are in lifting and sliding cooperation with the lifting ends of the lifting and adjusting components (2); The body component (1) is provided with a laser printing component (3), a material laying component (4) and a platform component (5) in order from top to bottom; The laser printing component (3) is connected to the lifting end of the lifting adjustment component (2) via a swing connecting rod (9); The platform component (5) is arranged at the lower part of the body component (1), and the platform component (5) is fixedly connected to the guide column (6); The material laying component (4) is arranged inside the machine body component (1) via a micro-lifting push rod (7); The lifting and lowering adjustment component (2) comprises a plurality of synchronous wheels A (201) arranged at the upper end of the body component (1); a synchronous wheel B (202) is arranged at the lower end of the body component (1) relative to the synchronous wheel A (201), and an auxiliary servo motor (203) is arranged on one side of the synchronous wheel B (202); and the synchronous wheel A (201) and the synchronous wheel B (202) are connected to each other by a synchronous belt (204), wherein a guide seat (205) is fixedly arranged on the synchronous belt (204); The laser printing assembly (3) comprises a mounting base (301); a hinge joint (3011) hingedly connected to the swing link (9) is arranged on a side of the mounting base (301); and a 3D metal printing laser head assembly (302) is arranged at the bottom of the mounting base (301); The platform assembly (5) comprises a basic connection platform (501); a plane groove (5011) is provided in a stepped manner inside the basic connection platform (501); a material storage bin (5012) is provided inside the basic connection platform (501); a fixed spiral support roll (502) is provided at the open end of the material storage bin (5012), Wherein, the end of the fixed spiral support coil (502) is fixedly connected to the material storage bin (5012); An auxiliary connecting frame (503) is arranged at the bottom of the basic connecting platform (501), a driving motor (504) is arranged on the auxiliary connecting frame (503), and a synchronous wheel C is arranged at the output end of the driving motor (504); a synchronous wheel shaft D (505) is rotatably arranged on the auxiliary connecting frame (503) through a bearing seat, and the synchronous wheel shaft D (505) is connected to the synchronous wheel C through a synchronous belt transmission; A driving cylinder (506) is provided on one side of the synchronous wheel shaft D (505), and a rotating seat (5061) is provided at the end of the driving cylinder (506); A connecting drive shaft (507) is provided on the rotating seat (5061) at a coaxial position relative to the synchronous wheel shaft D (505); a receiving groove (5071) is provided at the high end of the connecting drive shaft (507) and is hooked with the end of the fixed spiral support roll (502); wherein the connecting drive shaft (507) is key-connected to the synchronous wheel shaft D (505), The end of the connecting drive shaft (507) is provided with a filling compensation block (5072) which is wide at the top and narrow at the bottom; The material spreading component (4) comprises a rotating frame (401) arranged above the basic connection carrier (501); a rotating disk A (402) is arranged inside the rotating frame (401); the surface of the rotating disk A (402) is provided with limiting grooves (4021) in an annular shape and at equal intervals; a plurality of scraping and sweeping material spreading blocks (403) are arranged at the upper end of the rotating disk A (402), a rotating disk B (404) is arranged above the scraping and sweeping material spreading blocks (403), and a plurality of extrusion grooves (4041) are arranged in an annular shape and at equal intervals on the surface of the rotating disk B (404); Wherein, force-bearing protrusions (4031) are respectively arranged on both sides of the scraping and paving block (403); Furthermore, the sides of the rotating disk A (402) and the rotating disk B (404) are both meshed with drive gears (405), and the drive gears (405) are both driven and connected via a servo motor (406); A notch is provided on one side of the tip of the scraping and paving block (403), and an auxiliary channel (4032) is provided inside the notch.

2. A metal 3D printing device according to claim 1, characterized in that: The stroke of the driving cylinder (506) drives the rotating seat (5061) and the connecting driving shaft (507) to move downward, so that the fixed spiral support roll (502) is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block (5072) is located in the same plane as the top of the fixed spiral support roll (502), and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting driving shaft (507) to rotate in the forward direction, so that the fixed spiral support roll (502) is tightly fitted with the basic connecting carrier (501) to form a sealed horizontal printing surface structure.

3. A metal 3D printing device according to claim 2, characterized in that: The driving cylinder (506) drives the rotating seat (5061) and the connecting drive shaft (507) to move downward, so that the fixed spiral support roll (502) is adjusted from a conical state to a flat spiral state, and the upper surface of the filling compensation block (5072) and the top of the fixed spiral support roll (502) are located in the same plane, and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting drive shaft (507) to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll (502) forms a flat spiral material discharge cavity, which forms an integrated material return structure with the storage bin (5012).

4. A metal 3D printing device according to claim 3, characterized in that: The driving cylinder (506) drives the rotating seat (5061) and the connected driving shaft (507) to move upward during the return stroke, so that the fixed spiral support roll (502) is adjusted from a planar spiral state to a conical state, and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connected driving shaft (507) to perform positive rotational movement, so that the fixed spiral support roll (502) is locally tightly fitted along the spiral surface to form a powder use replacement structure and / or a printing support replacement structure for a metal part having an axial channel component and / or a printing support structure.

5. A metal 3D printing device according to claim 4, characterized in that: The driving cylinder (506) drives the rotating seat (5061) and the connecting driving shaft (507) to move upward during the return stroke, so that the fixed spiral support roll (502) is adjusted from a flat spiral state to a conical state, and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting driving shaft (507) to rotate in the opposite direction, so that the interior of the fixed spiral support roll (502) is tightened to form a stripping structure having a metal part of a printing support structure.

6. A working method of a metal 3D printing device according to claim 5, characterized in that: The following steps are involved: S100, adaptation and adjustment processing: S101, if the adaptable parts with hollow shafts and supporting structures are adapted and adjusted; the rotating seat (5061) is driven by the return stroke of the driving cylinder (506), and the connecting drive shaft (507) is driven to move upward, so that the fixed spiral support roll (502) is adjusted to a conical state, and the synchronous wheel C is driven by the driving motor (504) so ​​that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting drive shaft (507) to perform positive rotational movement, so that the fixed spiral support roll (502) is tightly fitted along the spiral surface locally, and the material discharge cavity is blocked in this way, and at the same time, the required axial space is filled by the required return stroke of the appropriate driving cylinder (506); S102, if the unsuitable metal parts are adapted and adjusted; the fixed spiral support roll (502) is compressed as a whole to a flat spiral state by driving the cylinder (506) to work in a stroke, and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting drive shaft (507) to perform positive rotational movement, so that the fixed spiral support roll (502) is tightly fitted; S200, printing process: a proper amount of metal powder is scattered onto the platform component (5) through the metal printing powder conveying device; and the plurality of lifting and adjusting components (2) are independently controlled to perform lifting and adjusting, thereby adjusting the laser printing component (3) as a whole at multiple angles and positions, thereby achieving a printing operation after the angle adjustment; S300, paving process: the servo motor (406) located on one side of the rotating disk B (404) drives the driving gear (405) to rotate the rotating disk B (404), and the force-bearing protrusion (4031) at one side is squeezed through the extrusion groove (4041), so that the scraping and sweeping paving block (403) rotates and slides while adjusting. In this way, the side of the fixed spiral support roll (502) in different height cone states can be scraped and leveled for metal powder. At the same time, after the above adjustment, the two servo motors (406) can be synchronously driven to cause the rotating disk A (402) and the rotating disk B (404) to rotate synchronously. Through the synchronous rotation, the scraping and sweeping paving block (403) can be used to fully sweep the powder, and then the printing process of step S200 is repeated. The printing is completed by repeating the operation; S400, stripping process: based on the spirally attached cone state of the fixed spiral support roll (502), the synchronous wheel C is driven by the driving motor (504) so ​​that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting driving shaft (507) to perform reverse rotational movement, so that the fixed spiral support roll (502) is partially contracted inward in sequence, so that the fixed spiral support roll (502) is separated from the local support structure of the metal printing, and then the basic connection carrier (501) is connected and separated by a tool; S500, material return processing: the fixed spiral support roll (502) is compressed as a whole to a flat spiral state by driving the cylinder (506) to work in a stroke, and the driving motor (504) drives the synchronous wheel C so that the synchronous belt drives the synchronous wheel shaft D (505) and the connecting driving shaft (507) to rotate in the opposite direction, so that the internal gap of the fixed spiral support roll (502) forms a flat spiral material discharge cavity, and the servo motor (406) located on one side of the rotating disk B (404) drives the driving gear (405) to rotate the rotating disk B (404), and the material is discharged through the extrusion groove (4041). To squeeze the force-bearing protrusion (4031) at one side, the scraping and spreading block (403) is caused to rotate and slide at the same time. In this way, the metal powder is scraped and leveled on the side of the fixed spiral support roll (502) in different height cone states. At the same time, after the above adjustment, the two servo motors (406) can be synchronously driven to cause the rotating disk A (402) and the rotating disk B (404) to rotate synchronously. After the synchronous rotation, the scraping and spreading block (403) is used to fully sweep the powder, and the powder after metal printing can be collected in the storage bin (5012).

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