Additive manufacturing device for heat dissipation structure of gas turbine

Abstract

The present invention belongs to the technical field of additive manufacturing, and specifically relates to an additive manufacturing device for a heat dissipation structure of a gas turbine, comprising a chassis, a laser assembly is arranged on the top of the chassis; a powder spreading assembly, the powder spreading assembly comprises a lift assembly arranged on the right side of the laser assembly, the inner cavity of the lift assembly is provided with a material distribution assembly, and the inner cavity of the lift assembly is provided with a discharge assembly below the material distribution assembly; a powder discharge assembly, the powder discharge assembly comprises a powder box assembly, and a pipeline assembly is arranged on the left side of the bottom of the powder box assembly. The invention can discharge metal powder quantitatively with the movement of the scraper, and complete the powder spreading of one stroke in two times, thereby improving the paving effect, further compacting the powder, and quantitatively feeding the metal powder into the discharge assembly to avoid excessive or insufficient powder spreading in one stroke, which affects the manufacturing quality, and can also discharge excess metal powder after the printing and manufacturing is completed, thereby improving the efficiency of material discharge.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and in particular relates to an additive manufacturing device for a heat dissipation structure of a gas turbine. Background Art

[0002] With the rapid development of high-tech fields such as aerospace, energy and power, the demand for high-performance and complex structural components is growing. As the core power unit in these fields, the design and manufacture of the heat dissipation structure of gas turbines is directly related to the operating efficiency and reliability of the whole machine; additive manufacturing technology (also known as 3D printing technology) can directly manufacture components with complex geometric shapes and internal structures with its unique layer-by-layer construction method, providing a new solution for the manufacture of gas turbine heat dissipation structures. However, in the additive manufacturing process, especially in processes such as laser sintering or electron beam melting using metal powder as raw materials, there are several problems that need to be solved.

[0003] First, the degree of compaction of metal powder between printing layers directly affects the density, mechanical properties and surface quality of the final product. Traditional additive manufacturing equipment often lacks an effective compaction mechanism after the powder is flattened, resulting in loose bonding between layers and affecting overall performance.

[0004] Secondly, efficient and uniform powder leveling is the key to ensure printing quality. In the prior art, powder leveling usually involves pushing out the added powder all at once and then scraping it evenly with a scraper. However, this method easily leads to uneven powder before and after the process, and powder is also prone to slipping out at both ends of the scraper, affecting the leveling effect.

[0005] Finally, after the additive manufacturing printing is completed, a large amount of unsintered metal powder will remain around the finished product. Timely cleaning of this powder is crucial for subsequent processing and maintenance of the working environment. The traditional method uses a handheld suction pipe for cleaning, which is not only labor-intensive but also inefficient. Summary of the invention

[0006] The purpose of the present invention is to provide an additive manufacturing device for a gas turbine heat dissipation structure, which can discharge metal powder in a quantitative manner as a scraper moves, and complete the powder laying in one stroke in two times to improve the leveling effect, and can further compact the powder. It can also feed the metal powder into a discharge component in a quantitative manner to avoid excessive or insufficient powder laying in one stroke, affecting the manufacturing quality. After the printing and manufacturing is completed, the excess metal powder can be discharged to improve the efficiency of material discharge.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A gas turbine heat dissipation structure additive manufacturing device comprises a chassis, a laser assembly is arranged on the top of the chassis;

[0009] A powder spreading component, the powder spreading component comprises a lifting and lowering component arranged on the right side of the laser component, the inner cavity of the lifting and lowering component is provided with a material distribution component, and the inner cavity of the lifting and lowering component is provided with a material discharge component at a position below the material distribution component;

[0010] A powder discharge assembly, the powder discharge assembly comprising a powder box assembly, and a pipeline assembly is arranged on the left side of the bottom of the powder box assembly;

[0011] When performing additive manufacturing, the material distribution component receives a fixed amount of metal powder and sends it to the material discharge component, and the material discharge component distributes the metal powder below the lifting and lowering component;

[0012] The laser assembly is used to drive the lift assembly to move and spread powder, and perform laser sintering after the powder is spread;

[0013] The powder box assembly is tilted after manufacturing to assist the pipeline assembly in discharging metal powder.

[0014] In a preferred embodiment, the laser assembly includes an electric movable platform fixedly connected to a chassis, a bracket is slidably connected to the electric movable platform, an XY axis movable platform is fixedly connected to the bracket, and a laser head is installed in the XY axis movable platform.

[0015] In a preferred embodiment, the lifting and lowering assembly includes a first electric push rod fixedly connected to the right side of the bracket, the bottom of the first electric push rod is fixedly connected to a moving box, the left and right sides of the bottom of the moving box are rotatably connected to scrapers, and the bottom surface of the moving box is fixedly connected to an infrared rangefinder.

[0016] In a preferred embodiment, the material dispensing component includes a storage box, the bottom of the inner cavity of the storage box is rotatably connected to a crawler, the outer ring of the crawler is fixedly connected to a push plate, the right side of the storage box is fixedly connected to a first motor, the output shaft of the first motor is fixedly connected to the rotating shaft of the crawler, the outer ring of the output shaft of the first motor is rollingly connected to a belt through a roller, the middle part of the storage box is rotatably connected to a rotating rod, the right end of the rotating rod is rollingly connected to the other end of the belt through a roller, the outer ring of the rotating rod is fixedly connected to a collision rod, the outer ring of the collision rod is contacted with the outer surface of the storage box, the bottom of the inner cavity of the storage box is slidably connected to a partition, the top of the mobile box is fixedly connected to a second electric push rod, the output end of the second electric push rod is fixedly connected to the outer end of the partition, and a quantitative cavity is opened between the top surface of the partition and the bottom surface of the crawler.

[0017] In a preferred embodiment, the discharge assembly includes a second motor fixedly connected to the top of the inner cavity of the moving box, the output shaft of the second motor is fixedly connected with a spiral sheet, the spiral sheet is rotatably connected to the top of the inner cavity of the moving box, the moving box is evenly provided with a storage cavity below the spiral sheet, the bottom of the storage cavity is slidably connected with a grid plate, the top of the grid plate is fixedly connected with a T-shaped rod, the middle part of the inner cavity of the moving box is fixedly connected with a third motor, the output shaft of the third motor is fixedly connected with a turntable, the bottom inner ring of the turntable is fixedly connected with a push rod, and the push rod is movably sleeved in the inner cavity of the T-shaped rod.

[0018] In a preferred embodiment, the powder box assembly includes a bottom plate fixedly connected to the chassis, the top of the bottom plate is rotatably connected to a manufacturing box, the left side of the inner cavity of the manufacturing box is fixedly connected to a first anti-collision strip, the left bottom of the movable box is fixedly connected to a second anti-collision strip, the bottom of the chassis is fixedly connected to a hydraulic rod, an arc-shaped protrusion is fixedly connected to the output shaft of the hydraulic rod, and the top of the arc-shaped protrusion passes through the bottom plate and contacts the bottom surface of the manufacturing box.

[0019] In a preferred embodiment, the pipeline assembly includes a discharge pipe connected to the front and rear sides of the bottom of the manufacturing box, the inner cavity of the discharge pipe is slidably connected with a sealing plug, the bottom of the sealing plug passes through the discharge pipe and is fixedly connected with a third electric push rod, and the bottom of the third electric push rod is fixedly connected to the bottom of the inner cavity of the chassis.

[0020] In a preferred embodiment, the partition has a built-in weighing sensor, and the storage box is provided with a slope below the partition.

[0021] In a preferred embodiment, the XY axis moving platform is a combination of an X axis moving platform and a Y axis moving platform.

[0022] In a preferred embodiment, the width of the through-slot region in the middle of the grid plate is greater than the width of the interior of the storage cavity.

[0023] The technical effects achieved by the present invention are:

[0024] The powder spreading component of the present invention can discharge metal powder quantitatively along with the movement of the scraper plate, which not only prevents the accumulation of metal powder and leakage at the front and rear ends, but also improves the uniformity of powder spreading. When spreading powder, the lifting and lowering component is operated to lift and lower, and the bottom of the discharge component is moved to a suitable height, and then the laser component is operated to drive the lifting and lowering component to move horizontally to spread powder. When the lifting and lowering component moves, the metal powder in the discharge component keeps falling, so that the powder is spread evenly during the movement. At the same time, after the first powder spreading, the lifting and lowering component moves in the opposite direction to spread powder for the second time, and the metal powder is compacted through the second powder spreading stroke, thereby improving the processing effect.

[0025] The material dividing component of the present invention can quantitatively feed metal powder into the material discharging component, so as to avoid excessive or insufficient powder spreading in one stroke, which affects the manufacturing quality. Before spreading the powder, the material dividing component separates and stores a certain amount of metal powder, and during the separation process, continuously detects the weight of the separated metal powder to accurately control the amount of the metal powder. When spreading is required, the material dividing component feeds the separated metal powder into the material discharging component for spreading, so as to improve the applicability and the accuracy of spreading the powder.

[0026] The powder discharge assembly of the present invention can discharge excess metal powder after printing and manufacturing is completed, thereby improving the efficiency of material discharge. After the additive manufacturing operation is completed, the moving part of the pipeline assembly is extended to open the outlet of the powder box assembly to quickly discharge excess metal powder. At the same time, the moving part of the powder box assembly is also extended to tilt the main body of the powder box assembly toward the outlet to improve the discharge efficiency. In the process of discharge, the clamping part of the powder box assembly and the lifting and lowering assembly will support the printed product to prevent the finished product from being damaged when the powder box assembly is tilted. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the laser assembly in the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the powder spreading component in the present invention;

[0030] Figure 4 is a cross-sectional schematic diagram of the storage box of the present invention;

[0031] Figure 5 It is a structural schematic diagram of the mobile box in the present invention;

[0032] Figure 6 It is a cross-sectional schematic diagram of the material distribution component in the present invention;

[0033] Figure 7 It is a positional relationship diagram of the material distribution component and the material discharge component in the present invention;

[0034] Figure 8 is a cross-sectional schematic diagram of a discharge assembly in the present invention;

[0035] Fig. 9 is a bottom schematic diagram of the turntable in the present invention;

[0036] Fig.10 It is a cross-sectional schematic diagram of the mobile box in the present invention;

[0037] Fig.11 It is a schematic diagram of the structure of the powder discharge assembly in the present invention;

[0038] Fig.12 It is a schematic diagram of the structure of the arc-shaped protrusion in the present invention;

[0039] Fig.13 It is a cross-sectional schematic diagram of the pipeline assembly in the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 10. chassis; 11. laser assembly; 111. electric mobile platform; 112. bracket; 113. XY axis mobile platform; 114. laser head; 20. powder spreading assembly; 21. lifting assembly; 211. first electric push rod; 212. moving box; 213. scraper; 214. infrared rangefinder; 22. material distribution assembly; 221. storage box; 222. crawler; 223. push plate; 224. first motor; 225. belt; 226. rotating rod; 227. impact rod; 228. partition; 229. second electric push rod; 2 210, metering chamber; 23, discharge assembly; 231, second motor; 232, spiral sheet; 233, storage chamber; 234, grid plate; 235, T-bar; 236, third motor; 237, turntable; 238, push rod; 30, powder discharge assembly; 31, powder box assembly; 311, bottom plate; 312, manufacturing box; 313, first anti-collision strip; 314, second anti-collision strip; 315, hydraulic rod; 316, arc-shaped protrusion; 32, pipeline assembly; 321, discharge pipe; 322, sealing plug; 323, third electric push rod. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0045] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0046] Please refer to the attached Figure 1-Figure 13 As shown, this embodiment provides an additive manufacturing device for a gas turbine heat dissipation structure, comprising a chassis 10, a laser assembly 11 is disposed on the top of the chassis 10;

[0047] The powder spreading component 20 includes a lifting component 21 disposed on the right side of the laser component 11, a material distribution component 22 is disposed in the inner cavity of the lifting component 21, and a material discharge component 23 is disposed in the inner cavity of the lifting component 21 below the material distribution component 22;

[0048] A powder discharge assembly 30, the powder discharge assembly 30 includes a powder box assembly 31, and a pipe assembly 32 is provided on the left side of the bottom of the powder box assembly 31;

[0049] When performing additive manufacturing, the material distribution component 22 receives a fixed amount of metal powder and sends it to the material discharge component 23, and the material discharge component 23 distributes the metal powder below the lifting component 21;

[0050] The laser assembly 11 is used to drive the lift assembly 21 to move and spread powder, and perform laser sintering after the powder is spread;

[0051] The powder box assembly 31 is tilted after manufacturing, and the auxiliary pipe assembly 32 discharges the metal powder.

[0052] In this embodiment, before the powder is spread, the metal powder is transported into the material distribution component 22, and then the material distribution component 22 separates and stores a fixed amount of metal powder (the amount of one powder spreading stroke) through operation, and when the powder needs to be spread, the material distribution component 22 sends the separated metal powder to the discharge component 23 below. The discharge component 23 ensures that the metal powder can be spread evenly and continuously on the platform below the lifting and landing component 21 to form a dense and uniform powder layer. Subsequently, the laser component 11 is started to drive the lifting and landing component 21 to move, and the powder of a single stroke is flattened and compacted twice to improve the flattening effect. After flattening, the laser component 11 sintered the flattened powder through the laser generating part to construct a high-quality gas turbine heat dissipation structure. After the additive manufacturing operation is completed, the powder discharge component 30 begins to work. At this time, the powder box component 31 is tilted to one side under the drive, and the pipeline component 32 is opened, so that the excess metal powder is quickly discharged through the pipeline under the action of gravity.

[0053] Next, please refer to Figure 1-Figure 5, Fig.10 The laser assembly 11 includes an electric mobile platform 111 fixedly connected to the chassis 10, a bracket 112 is slidably connected to the electric mobile platform 111, an XY axis mobile platform 113 is fixedly connected to the bracket 112, and a laser head 114 is installed in the XY axis mobile platform 113;

[0054] The lifting and lowering assembly 21 includes a first electric push rod 211 fixedly connected to the right side of the bracket 112, a moving box 212 is fixedly connected to the bottom of the first electric push rod 211, scrapers 213 are rotatably connected to the left and right sides of the bottom of the moving box 212, and an infrared rangefinder 214 is fixedly connected to the bottom surface of the moving box 212;

[0055] The XY axis moving platform 113 is a combination of an X axis moving platform and a Y axis moving platform.

[0056] It should be noted that the scraper 213 is connected to a pneumatic pump for controlling the rotation of the scraper 213; at the same time, limit plates are arranged at the bottom of the left and right sides of the moving box 212 below the scraper 213 to control the rotation stroke of the scraper 213; in addition, a plurality of groups of dividing strips are evenly arranged at the bottom of the scraper 213 to evenly distribute the powder under the scraper 213 to improve the paving effect;

[0057] There are two groups of scrapers 213, distributed on the left and right sides of the mobile box 212, so that during the powder spreading process, the amount of powder spread in a single time can be divided into two strokes for laying, thereby improving the paving effect. At the same time, the powder can be compacted by using the two powder spreading strokes to improve the manufacturing effect.

[0058] In this embodiment, during the powder spreading process, the first electric push rod 211 operates, driving the mobile box 212 and the scraper 213 below it to descend until they approach or touch the bottom of the manufacturing box 312. At this time, the XY axis moving platform 113 starts to work, driving the laser head 114 to move along the preset path. At the same time, the laser head 114 is also started to prepare for subsequent sintering operations. However, at this stage, its main task is to cooperate with the lifting and lowering assembly 21 to complete the powder spreading process. As the mobile box 212 descends, the scraper 213 contacts the metal powder layer evenly distributed on the platform by the discharge assembly 23. The pneumatic pump is activated, driving the scraper 213 to rotate slightly, and using the dividing strips at its bottom to further refine the metal powder and spread it evenly. During this process, the infrared rangefinder 214 continuously monitors the distance between the scraper 213 and the working platform to ensure the consistency of the powder spreading thickness and avoid sintering quality problems caused by uneven thickness. After completing a single powder spreading, the XY-axis moving platform 113 may move back and forth according to a preset program, and use the scraper 213 on the other side to press lightly again to achieve secondary powder spreading and compaction of the powder layer, thereby improving the density and flatness of the powder layer. This process is crucial to improving the accuracy and strength of the final product. Next, the laser head 114 begins to laser sinter the laid metal powder layer according to the preset three-dimensional model data. Under the precise control of the XY-axis moving platform 113, the laser beam scans and melts the metal powder particles layer by layer, and gradually builds up the complex shape of the gas turbine heat dissipation structure through layer-by-layer superposition. When one layer is sintered, the lifting and lowering assembly 21 starts again to lift the moving box 212 to a certain height in preparation for the next layer of powder spreading. At this time, the discharge assembly 23 works again to evenly distribute the new metal powder layer on the platform, and repeats the above powder spreading and sintering process until the entire gas turbine heat dissipation structure is completely manufactured;

[0059] It is worth noting that in the entire additive manufacturing process, the cooperation and coordination between the various components are crucial. In order to achieve this goal, the device of the present invention is also equipped with an advanced control system that can monitor the working status of each component in real time and make intelligent adjustments. For example, the thickness and uniformity of the powder layer are monitored by sensors such as the infrared rangefinder 214, and the rotation speed and working time of the discharge component 23 are adjusted through the feedback mechanism; the quality and efficiency of laser sintering are ensured by monitoring the power and scanning speed of the laser component 11. These intelligent control methods not only improve the accuracy and stability of additive manufacturing, but also greatly reduce the difficulty and error rate of manual operation.

[0060] Next, please refer to Figure 3-Figure 7The material distribution component 22 includes a storage box 221, the bottom of the inner cavity of the storage box 221 is rotatably connected to a crawler 222, the outer ring of the crawler 222 is fixedly connected to a push plate 223, the right side of the storage box 221 is fixedly connected to a first motor 224, the output shaft of the first motor 224 is fixedly connected to the rotating shaft of the crawler 222, the outer ring of the output shaft of the first motor 224 is rollingly connected to a belt 225 through a roller, the middle part of the storage box 221 is rotatably connected to a rotating rod 226, and the right end of the rotating rod 226 is connected to the storage box 221. The roller is connected with the other end of the belt 225 in a rolling manner, the outer ring of the rotating rod 226 is fixedly connected with the impact rod 227, the outer ring of the impact rod 227 is in contact with the outer surface of the storage box 221, the bottom of the inner cavity of the storage box 221 is slidably connected with a partition 228, the top of the moving box 212 is fixedly connected with a second electric push rod 229, the output end of the second electric push rod 229 is fixedly connected with the outer end of the partition 228, and a quantitative cavity 2210 is opened between the top surface of the partition 228 and the bottom surface of the crawler 222;

[0061] The partition 228 has a built-in weighing sensor, and the storage box 221 has a slope below the partition 228 .

[0062] It should be noted that the portion where the storage box 221 contacts the impact rod 227 is an inclined surface and is a thin metal plate, so that the impact rod 227 can impact the storage box 221 to generate vibration to prevent metal powder from accumulating on the inner cavity wall of the storage box 221.

[0063] In this embodiment, after the powder enters the storage box 221 and is collected, the first motor 224 starts to operate, driving the crawler 222 and the push plate 223 thereon to circulate in the inner cavity of the storage box 221. In this process, the push plate 223 not only pushes the metal powder from the metal powder in the storage box 221 into the quantitative cavity 2210, but also assists the metal powder to remain loose in the storage box 221 through the driving force generated when it moves, so as to avoid agglomeration. At the same time, when the output shaft of the first motor 224 rotates, the belt 225 drives the rotating rod 226 to rotate, thereby causing the impact rod 227 to periodically impact the outer surface of the storage box 221. This impact action not only strengthens the vibration of the storage box 221, helps to further prevent the accumulation of metal powder, but also promotes the uniform distribution of metal powder in the storage box 221. As the push plate 223 advances, the metal powder is gradually pushed into the quantitative cavity 2210. The design of the quantitative chamber 2210 ensures that only a certain amount of metal powder can enter the moving box 212 through the partition 228 for powder spreading operation each time. When the metal powder in the quantitative chamber 2210 reaches a preset weight, the built-in weighing sensor of the partition 228 will send a signal to the control system, and the second electric push rod 229 will start to push the partition 228 outward, allowing the metal powder in the quantitative chamber 2210 to fall into the moving box 212.

[0064] Next, please refer to Figure 7-Figure 10 The discharge assembly 23 includes a second motor 231 fixedly connected to the top of the inner cavity of the moving box 212, a spiral piece 232 is fixedly connected to the output shaft of the second motor 231, and the spiral piece 232 is rotatably connected to the top of the inner cavity of the moving box 212. The moving box 212 is evenly provided with a storage cavity 233 below the spiral piece 232, and a grid plate 234 is slidably connected to the bottom of the storage cavity 233. A T-shaped rod 235 is fixedly connected to the top of the grid plate 234. A third motor 236 is fixedly connected to the middle of the inner cavity of the moving box 212, and a turntable 237 is fixedly connected to the output shaft of the third motor 236. A push rod 238 is fixedly connected to the bottom inner ring of the turntable 237, and the push rod 238 is movably sleeved in the inner cavity of the T-shaped rod 235.

[0065] The width of the through-slot region in the middle of the grid plate 234 is greater than the width of the interior of the receiving cavity 233 .

[0066] It should be noted that the total volume of the multiple groups of storage chambers 233 is the same as the volume of the metal powder that can be accommodated by the quantitative chamber 2210;

[0067] In the process of feeding the metal powder into the storage chamber 233, the spiral piece 232 can continuously rotate forward and reverse to ensure that the metal powder in each storage chamber 233 is evenly stored;

[0068] A through slot is formed in the longer portion of the T-shaped rod 235 , and the push rod 238 is movably sleeved in the through slot, so that the T-shaped rod 235 can be pushed to reciprocate by the rotation of the push rod 238 .

[0069] In this embodiment, after the metal powder enters the moving box 212, the second motor 231 is started, driving the spiral blade 232 to rotate in the inner cavity of the moving box 212, and evenly guiding the metal powder to each storage cavity 233. Subsequently, the third motor 236 starts to operate, and its output shaft drives the turntable 237 and the push rod 238 to rotate. During the rotation process, the push rod 238 pushes the T-bar 235 and the grid plate 234 connected thereto to make reciprocating movements in the moving box 212. This action not only makes the metal powder on the grid plate 234 more compact, but also, through the sliding of the grid plate 234, the metal powder is evenly dropped from the storage cavity 233 and laid on the bottom of the moving box 212, preparing for subsequent leveling.

[0070] It is worth noting that the entire discharge assembly 23 is also equipped with advanced sensors and control systems (not shown in the figure) to monitor the distribution of metal powder and the movement of the grid plate 234 in real time. Once an abnormal situation is found, such as uneven distribution of metal powder or obstruction of the movement of the grid plate 234, the control system will immediately issue an alarm and take corresponding adjustment measures to ensure the smooth progress of the additive manufacturing process.

[0071] Please refer again Figure 11-13 The powder box assembly 31 includes a bottom plate 311 fixedly connected to the chassis 10, the top of the bottom plate 311 is rotatably connected to a manufacturing box 312, a first anti-collision strip 313 is fixedly connected to the left side of the inner cavity of the manufacturing box 312, a second anti-collision strip 314 is fixedly connected to the left bottom of the mobile box 212, a hydraulic rod 315 is fixedly connected to the bottom of the chassis 10, an arc-shaped protrusion 316 is fixedly connected to the output shaft of the hydraulic rod 315, and the top of the arc-shaped protrusion 316 passes through the bottom plate 311 and contacts the bottom surface of the manufacturing box 312;

[0072] The pipeline assembly 32 includes a discharge pipe 321 connected to the front and rear sides of the bottom of the manufacturing box 312. The inner cavity of the discharge pipe 321 is slidably connected with a sealing plug 322. The bottom of the sealing plug 322 passes through the discharge pipe 321 and is fixedly connected with a third electric push rod 323. The bottom of the third electric push rod 323 is fixedly connected to the bottom of the inner cavity of the chassis 10.

[0073] It should be noted that the bottom of the bottom plate 311 is provided with a plurality of through grooves, and the discharge pipe 321 and the arc-shaped protrusion 316 are both through the through grooves and in contact with the manufacturing box 312;

[0074] There are two sets of pipe assemblies 32, which are distributed on the front and rear sides of the left side of the manufacturing box 312, in order to improve the efficiency of powder discharge;

[0075] The outer ring of the sealing plug 322 is provided with a sealing strip to prevent the metal powder from leaking prematurely, causing uneven paving and affecting the quality of the finished product.

[0076] In this embodiment, after the additive manufacturing operation is completed, the third electric push rods 323 in the two sets of pipeline assemblies 32 are started at the same time, and they each push the sealing plug 322 to slide upward along the inner cavity of the discharge pipe 321 until the entrance of the discharge pipe 321 is fully opened, and the metal powder begins to be discharged in an orderly manner through the discharge pipe 321. As the metal powder is discharged, the space in the manufacturing box 312 is gradually emptied, and the hydraulic rod 315 on the chassis 10 starts to work, and its output shaft pushes the arc-shaped protrusion 316 upward, so that the top of the arc-shaped protrusion 316 is in close contact with the bottom surface of the manufacturing box 312 and exerts an upward force, so that the manufacturing box 312 tilts to the left, improving the powder discharge efficiency, and at the same time, the mobile box 212 also moves to make the second anti-collision strip 314 contact the finished part, and push the finished part to contact the first anti-collision strip 313, and slowly clamp the finished part to prevent the finished part from suddenly sliding down during the tilting process, causing damage and affecting the quality.

[0077] The working principle of the present invention is as follows: during the process of spreading powder, the first electric push rod 211 runs, driving the mobile box 212 to descend until it contacts the manufacturing box 312. At this time, after the powder enters the storage box 221, the first motor 224 starts to operate, driving the crawler 222 and the push plate 223 thereon to circulate in the inner cavity of the storage box 221, pushing the metal powder from the metal powder in the storage box 221 into the quantitative cavity 2210. When the metal powder in the quantitative cavity 2210 reaches a preset weight, the built-in weight sensor of the partition 228 will send a signal to the control system, and the second electric push rod 229 will start, pushing the partition 228 to move outward, allowing the metal powder in the quantitative cavity 2210 to fall into the mobile box 212. Subsequently, the second motor 231 starts, driving the spiral piece 232 to rotate, and evenly guiding the metal powder to each storage cavity 233. Subsequently, the third motor 236 drives the turntable 237 and the push rod 238 to rotate. The T-bar 235 and the grid plate 234 are pushed to move back and forth, and the metal powder is evenly dropped from the storage chamber 233 to the bottom of the moving box 212. Subsequently, the moving box 212 is driven to move by the XY axis moving platform 113, so that the scraper 213 contacts the metal powder, and then the metal powder is evenly spread and compacted in two strokes. Next, the laser head 114 scans and melts the metal powder particles layer by layer according to the preset three-dimensional model data under the precise control of the XY axis moving platform 113, and gradually builds up the complex shape of the gas turbine heat dissipation structure through layer-by-layer stacking. After sintering is completed, the third electric push rod 323 pushes the sealing plug 322 to slide upward until the entrance of the discharge pipe 321 is opened, and the metal powder begins to be discharged in an orderly manner through the discharge pipe 321. Subsequently, the hydraulic rod 315 pushes the arc-shaped protrusion 316 upward, causing the manufacturing box 312 to tilt to the left, thereby improving the powder discharge efficiency. At the same time, the movable box 212 also moves to make the second anti-collision strip 314 contact the finished part, and push the finished part to contact the first anti-collision strip 313, and slowly clamp the finished part to prevent the finished part from suddenly sliding down during the tilting process, causing damage and affecting the quality.

[0078] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An additive manufacturing device for a gas turbine heat dissipation structure, characterized in that: include: A chassis (10), wherein a laser assembly (11) is arranged on the top of the chassis (10); A powder spreading component (20), the powder spreading component (20) comprising a lifting component (21) arranged on the right side of the laser component (11), a material distribution component (22) being arranged in an inner cavity of the lifting component (21), and a material discharge component (23) being arranged in an inner cavity of the lifting component (21) below the material distribution component (22); A powder discharge assembly (30), the powder discharge assembly (30) comprising a powder box assembly (31), a pipe assembly (32) being arranged on the left side of the bottom of the powder box assembly (31); When performing additive manufacturing, the material distribution component (22) receives a fixed amount of metal powder and sends it to the material discharge component (23), and the material discharge component (23) distributes the metal powder below the lifting component (21); The laser component (11) is used to drive the lifting component (21) to move and spread powder, and to perform laser sintering after the powder is spread; The powder box assembly (31) is tilted after manufacturing to assist the pipe assembly (32) in discharging metal powder; The laser assembly (11) comprises an electric movable platform (111) fixedly connected to the chassis (10), a bracket (112) being slidably connected inside the electric movable platform (111), an XY axis movable platform (113) being fixedly connected to the bracket (112), and a laser head (114) being installed inside the XY axis movable platform (113); The lifting and lowering assembly (21) comprises a first electric push rod (211) fixedly connected to the right side of the bracket (112); a moving box (212) is fixedly connected to the bottom of the first electric push rod (211); scrapers (213) are rotatably connected to the left and right sides of the bottom of the moving box (212); and an infrared rangefinder (214) is fixedly connected to the bottom surface of the moving box (212); The material distribution component (22) comprises a storage box (221), the bottom of the inner cavity of the storage box (221) is rotatably connected to a crawler (222), the outer ring of the crawler (222) is fixedly connected to a push plate (223), the right side of the storage box (221) is fixedly connected to a first motor (224), the output shaft of the first motor (224) is fixedly connected to the rotating shaft of the crawler (222), the outer ring of the output shaft of the first motor (224) is rotatably connected to a belt (225) via a roller, the middle part of the storage box (221) is rotatably connected to a rotating rod (226), the right side of the rotating rod (226) is fixedly connected to the storage box (221), and the storage box (221) is fixedly connected to the outer ring of the crawler (222). The end of the rotating rod (226) is rollingly connected to the other end of the belt (225) through a roller, the outer ring of the rotating rod (226) is fixedly connected to a striking rod (227), the outer ring of the striking rod (227) is in contact with the outer surface of the storage box (221), the bottom of the inner cavity of the storage box (221) is slidably connected to a partition (228), the top of the moving box (212) is fixedly connected to a second electric push rod (229), the output end of the second electric push rod (229) is fixedly connected to the outer end of the partition (228), and a quantitative cavity (2210) is provided between the top surface of the partition (228) and the bottom surface of the crawler belt (222); The material discharge assembly (23) comprises a second motor (231) fixedly connected to the top of the inner cavity of the moving box (212); a spiral piece (232) is fixedly connected to the output shaft of the second motor (231); the spiral piece (232) is rotatably connected to the top of the inner cavity of the moving box (212); the moving box (212) is evenly provided with a storage cavity (233) below the spiral piece (232); a grid plate (234) is slidably connected to the bottom of the storage cavity (233); a T-shaped rod (235) is fixedly connected to the top of the grid plate (234); a third motor (236) is fixedly connected to the middle of the inner cavity of the moving box (212); a rotating disk (237) is fixedly connected to the output shaft of the third motor (236); a push rod (238) is fixedly connected to the inner ring of the bottom of the rotating disk (237); and the push rod (238) is movably sleeved in the inner cavity of the T-shaped rod (235).

2. The additive manufacturing device for a gas turbine heat dissipation structure according to claim 1, characterized in that: The powder box assembly (31) comprises a bottom plate (311) fixedly connected to the chassis (10); the top of the bottom plate (311) is rotatably connected to a manufacturing box (312); the left side of the inner cavity of the manufacturing box (312) is fixedly connected to a first anti-collision strip (313); the left bottom of the movable box (212) is fixedly connected to a second anti-collision strip (314); the bottom of the chassis (10) is fixedly connected to a hydraulic rod (315); an arc-shaped protrusion (316) is fixedly connected to the output shaft of the hydraulic rod (315); the top of the arc-shaped protrusion (316) passes through the bottom plate (311) and contacts the bottom surface of the manufacturing box (312).

3. The additive manufacturing device for a gas turbine heat dissipation structure according to claim 2, characterized in that: The pipeline assembly (32) comprises a discharge pipe (321) connected to the front and rear sides of the bottom of the manufacturing box (312); the inner cavity of the discharge pipe (321) is slidably connected to a sealing plug (322); the bottom of the sealing plug (322) passes through the discharge pipe (321) and is fixedly connected to a third electric push rod (323); the bottom of the third electric push rod (323) is fixedly connected to the bottom of the inner cavity of the chassis (10).

4. The additive manufacturing device for a gas turbine heat dissipation structure according to claim 1, characterized in that: The partition (228) has a built-in weighing sensor, and the storage box (221) is provided with a slope at a position below the partition (228).

5. The additive manufacturing device for a gas turbine heat dissipation structure according to claim 1, characterized in that: The XY axis moving platform (113) is composed of a combination of an X axis moving platform and a Y axis moving platform.

6. The additive manufacturing device for a gas turbine heat dissipation structure according to claim 1, characterized in that: The width of the through-slot region in the middle of the grid plate (234) is greater than the width inside the storage cavity (233).

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