Additive manufacturing device for gas turbine compressor blade

Abstract

The invention belongs to the technical field of metal additive manufacturing, and particularly relates to a gas turbine compressor blade additive manufacturing device which comprises a machine body, and a workbench is arranged in the machine body; the bottom of the box body is rotationally connected with a rotating plate; the powder spreading mechanism is used for bidirectional powder spreading; the grinding mechanism is used for grinding sintered and accumulated powder in the blade material adding process; the powder scraping mechanism is used for removing powder attached to the grinding mechanism; and the powder collecting mechanism is used for collecting powder. The grinding mechanism can rotate along with work of the powder laying mechanism and grind sintered and accumulated powder in two directions, the roughness of a blade cooling channel is reduced in the additive manufacturing process, the communicating state of powder outlet plates on the two sides of a grinding roller can be switched through rotation of a rotating plate on the box body, the interlayer retention time of additive manufacturing is shortened, and the efficiency of additive manufacturing is improved. And therefore, the heat dissipation efficiency of the blade cooling channel after additive manufacturing is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal additive manufacturing, and in particular relates to an additive manufacturing device for gas turbine compressor blades. Background Art

[0002] A gas turbine is a rotating impeller heat engine that converts fuel energy into useful work. It inhales and compresses air through a compressor, and then the air enters the combustion chamber and mixes with the fuel to burn. The high-temperature and high-pressure gas generated drives the turbine to rotate, thereby outputting power. Among them, the blades of the compressor are usually manufactured by additive manufacturing, using a laser to melt the metal powder layer by layer according to a set path and accurately deposit it in three-dimensional space. Each layer printed will automatically lay a layer of metal powder until the blade is formed. In order to facilitate heat dissipation, some compressor blades are designed with internal cooling channels to remove heat through flowing air or coolant.

[0003] During use of the existing additive manufacturing device for gas turbine compressor blades, when the laser irradiates the metal powder, it is easy to cause the powder near the path to fly up, causing the powder to sinter and accumulate in the area near the path and bulge, affecting the normal printing of the unprinted area, resulting in an increase in the roughness of the blade cooling channel. Since the blade cooling channel is generally designed to be curved, in the traditional method, it is difficult to further process it after additive manufacturing to reduce the roughness of the channel. The cooling channel with large roughness is easy to hinder the flow of gas or coolant during the heat dissipation process, resulting in insufficient heat dissipation efficiency of the channel. In addition, the powder is generally spread in one direction. After the powder spreading mechanism moves from the initial position to one end of the workbench to complete the powder spreading, it needs to return to the original position. It is difficult for the device to perform additive manufacturing during the round trip of the powder spreading mechanism. This method makes the inter-layer residence time of additive manufacturing longer, which is not conducive to the fusion of two adjacent layers of materials. Excessive cooling may even cause cracks, affecting the roughness of the blade cooling channel, thereby resulting in insufficient heat dissipation efficiency of the cooling channel. Summary of the invention

[0004] The object of the present invention is to provide an additive manufacturing device for gas turbine compressor blades, which can rotate along with the operation of the powder spreading mechanism through a grinding mechanism and grind the sintered and accumulated powder in two directions, thereby reducing the roughness of the blade cooling channel during the additive manufacturing process, and can rotate on the box body through a rotating plate to switch the connectivity of the powder outlet plates on both sides of the grinding roller, so that during the reciprocating movement of the box body, the powder spreading mechanism can spread powder from two directions respectively, reducing the inter-layer residence time of additive manufacturing, thereby improving the heat dissipation efficiency of the blade cooling channel after additive manufacturing.

[0005] The technical solution adopted by the present invention is as follows: An additive manufacturing device for a gas turbine compressor blade, comprising: A machine body, wherein a workbench is provided inside the machine body; A box body, wherein the box body is arranged above the workbench, the box body is slidably connected to the machine body, a rotating plate is rotatably connected to the bottom of the box body, a first motor is fixedly connected to the box body, an output end of the first motor is fixedly connected to the rotating plate, and a first unloading port and a second unloading port are respectively opened at two ends of the bottom of the box body; A powder spreading mechanism, the powder spreading mechanism is arranged at the bottom of the box body and is used for bidirectional powder spreading. The powder spreading mechanism includes a powder discharge plate fixedly connected to the bottom of the rotating plate. The powder discharge plates are provided with two and are respectively located at the two ends of the rotating plate. The two powder discharge plates are respectively connected to the first discharge port and the second discharge port. A powder scraper plate is provided on the outer side of the powder discharge plate. An auger is rotatably connected inside the box body. A second motor is provided at one end of the auger, and an output end of the second motor is fixedly connected to the auger. A grinding mechanism, which is arranged at the bottom of the box body, and is located between two powder outlet plates, and is used to grind the sintered and accumulated powder during the blade material addition process. The grinding mechanism includes a grinding roller rotatably connected to the bottom of the box body, and the grinding roller is connected to the auger transmission; A powder scraping mechanism, the powder scraping mechanism is arranged above the grinding mechanism, and is used to remove powder attached to the grinding mechanism. The powder scraping mechanism includes a lifting plate and a powder removal plate slidably connected to the bottom of the box body, a connecting rod is slidably connected between the lifting plate and the powder removal plate, the connecting rod is rotatably connected to the box body, and a spring is connected between the lifting plate and the box body; A powder collecting mechanism, the powder collecting mechanism is arranged outside the grinding mechanism and is used to collect powder. The powder collecting mechanism comprises two powder suction plates respectively arranged on both sides of the grinding mechanism, the powder suction plate is located between the grinding mechanism and the powder discharge plate, the powder suction plate is fixedly connected to the bottom of the rotating plate, and two return pumps are arranged on the box body, the input end of the return pump is connected to the powder suction plate, and the output end of the return pump is connected to the inside of the box body; Among them, when the box moves along the workbench, the second motor rotates forward or reversely so that the grinding mechanism can grind the sintered accumulated powder in two directions, the powder collecting mechanism collects the flying powder and moves it into the box, and the second motor rotates forward or reversely so that the second motor drives the powder to fall evenly in the box, and the rotating plate rotates to switch the connection state between the first feeding port and the second feeding port to realize two-way powder spreading, and the outer diameter of the grinding mechanism increases after the powder adheres to the grinding mechanism, so that the powder scraping mechanism cleans the grinding mechanism after operation, and the powder collecting mechanism collects the removed powder and moves it into the box.

[0006] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a feed port is provided on the top of the box body, and the feed port is located above the middle part of the auger.

[0007] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a material dividing block is provided at the bottom of the box body, inclined portions are provided on both sides of the material dividing block, and the auger is located above the top of the inclined portion.

[0008] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a first channel is opened on the side of the material distribution block close to the first discharge port, and a second channel is opened on the side of the material distribution block close to the second discharge port.

[0009] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, the grinding mechanism also includes a first pulley fixedly connected to one end of the grinding roller, one end of the auger is fixedly connected to a second pulley, and a transmission belt is connected between the first pulley and the second pulley.

[0010] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, strip holes are provided at both ends of the connecting rod, a first sliding column is fixedly connected to the lifting plate, and a second sliding column is fixedly connected to the powder removal plate, the two strip holes are respectively slidably matched with the first sliding column and the second sliding column, and the two strip holes are also respectively rotatably matched with the first sliding column and the second sliding column.

[0011] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a powder outlet channel is opened inside the powder outlet plate, and when the first feed outlet is aligned with one powder outlet channel, the second feed outlet is staggered with another powder outlet channel.

[0012] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a powder suction channel is opened inside the powder suction plate, and when the first channel is aligned with one powder suction channel, the second channel is staggered with another powder suction channel.

[0013] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, the lower end height of the powder discharge plate is higher than the lower end height of the powder scraper plate, the lower end height of the powder discharge plate is also lower than the lower end height of the powder suction plate, and the lower end height of the powder scraper plate is higher than the lower end height of the grinding roller.

[0014] As a preferred solution of the additive manufacturing device for gas turbine compressor blades described in the present invention, a powder suction port is provided at the lower end of the powder suction plate, and the powder suction port is horizontally facing the grinding roller.

[0015] The technical effects achieved by the present invention are: The present invention adopts the design of a grinding mechanism, which can rotate with the operation of the powder spreading mechanism and grind the sintered and accumulated powder in two directions. After the second motor works, the output end drives the auger to rotate, and the auger disperses the powder dropped by the return pump. At the same time, the auger also drives the grinding roller to rotate through the second pulley, the transmission belt and the first pulley, so that in the process of the box moving along the workbench, the grinding roller grinds the sintered and accumulated powder. By switching the second motor to rotate forward or reverse, the auger disperses the powder to both ends, and the auger also drives the grinding roller to rotate clockwise or counterclockwise, and the sintered and accumulated powder is ground in two directions, which is convenient for reducing the roughness of the cooling channel of the blade. Compared with the situation that it is difficult to further process to reduce the roughness of the channel after additive manufacturing in the traditional way, the situation that the cooling channel with large roughness is easy to hinder the flow of gas or coolant during the heat dissipation process is reduced, thereby improving the heat dissipation efficiency of the cooling channel of the blade after additive manufacturing; The present invention adopts the design of a powder scraping mechanism, which can scrape off the powder attached to the grinding mechanism as the amount of powder attached to the grinding mechanism increases. After grinding by the grinding mechanism, the powder adheres to the grinding mechanism, which increases the outer diameter of the grinding mechanism. The grinding mechanism lifts up the lifting plate, and the lifting plate drives the powder removal plate to move downward through the connecting rod, so that the bottom of the powder removal plate contacts the powder attached to the grinding mechanism, thereby scraping off the powder attached to the grinding mechanism, reducing the situation in which the powder attached to the grinding mechanism affects the grinding efficiency of the grinding mechanism, and can automatically scrape off the powder attached to the grinding mechanism as the amount of powder attached to the grinding mechanism increases, thereby improving the grinding efficiency and the convenience of scraping off the powder. The present invention adopts the design of a powder collecting mechanism, which can collect the powder flying up during the grinding process of the grinding mechanism and the powder scraped off by the powder scraping mechanism, and recycle the powder for spreading. After the return pump is activated, the powder suction plate absorbs the powder and moves it to the box for storage, so as to reduce the situation where the powder affects the printing. The powder is spread again through the first discharge port or the second discharge port, so as to recycle the powder. The present invention adopts the design of a box body and a rotating plate. The rotating plate can rotate on the box body to switch the connection state of the powder suction plate and the powder discharge plate on both sides of the grinding roller. After the first motor works, the output end drives the rotating plate to rotate along the bottom of the box body, so that when the powder suction plate and the powder discharge plate on one side of the grinding roller are in a connected state, the powder suction plate and the powder discharge plate on the other side of the grinding roller are in a disconnected state. By switching the first motor to rotate forward or reverse, the rotating plate rotates clockwise or counterclockwise, so that in the process of the box going back and forth, the powder spreading mechanism can spread powder from two directions respectively, and the powder collecting mechanism can absorb powder from two directions respectively. Compared with the one-way powder spreading in the traditional method, the situation in which the interlayer residence time of additive manufacturing is long and affects the roughness of the blade cooling channel is reduced, thereby improving the heat dissipation efficiency of the blade cooling channel after additive manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the box body and the workbench in the present invention; Figure 3 It is a structural schematic diagram of the box body and the rotating plate in the present invention; Figure 4 It is a cross-sectional schematic diagram of the box body and the rotating plate in the present invention; Figure 5 It is an exploded schematic diagram of the box body and the rotating plate in the present invention; Figure 6 The present invention Figure 5 The enlarged schematic diagram of point A in the middle; Figure 7 It is a structural schematic diagram of the box body in the present invention; Figure 8 It is a structural schematic diagram of the rotating plate in the present invention; Fig. 9 It is a cross-sectional schematic diagram of the powder scraping mechanism and the grinding mechanism in the present invention; Fig.10 The present invention Fig. 9 The enlarged schematic diagram of point B in the middle; Fig.11 It is a cross-sectional schematic diagram of the grinding roller in the present invention when it rotates counterclockwise; Fig.12 It is a cross-sectional schematic diagram of the grinding roller in the present invention when it rotates clockwise.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 10. Machine body; 11. Workbench; 20, box body; 201, first material discharge port; 202, second material discharge port; 21, rotating plate; 211, through hole; 22, first motor; 23, feed port; 24, material distribution convex block; 241, inclined portion; 242, first channel; 243, second channel; 30. Powder spreading mechanism; 31. Powder discharging plate; 311. Powder discharging channel; 32. Powder scraping plate; 33. Auger; 34. Second motor; 40. grinding mechanism; 41. grinding roller; 42. first pulley; 43. second pulley; 44. transmission belt; 50, powder scraping mechanism; 51, lifting plate; 511, first slide column; 52, powder removing plate; 521, second slide column; 53, connecting rod; 531, strip hole; 54, spring; 60. Powder collecting mechanism; 61. Powder suction plate; 611. Powder suction channel; 612. Powder suction port; 62. Return pump. DETAILED DESCRIPTION

[0018] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0019] Example 1 like Figures 1 to 12 As shown, it is the first embodiment of the present invention, which provides an additive manufacturing device for gas turbine compressor blades, including a body 10, wherein a workbench 11 is provided inside the body 10; a box body 20, which is arranged above the workbench 11, and is slidably connected to the body 10, and a rotating plate 21 is rotatably connected to the bottom of the box body 20, and a first motor 22 is fixedly connected to the box body 20, and an output end of the first motor 22 is fixedly connected to the rotating plate 21, and a first discharge port 201 and a second discharge port 202 are respectively opened at both ends of the bottom of the box body 20; a powder spreading mechanism 30, the powder spreading mechanism 30 is arranged at the bottom of the box body 20, and is used for bidirectional powder spreading. The powder spreading mechanism 30 includes a powder discharge plate 31 fixedly connected to the bottom of the rotating plate 21, and two powder discharge plates 31 are provided and are respectively located at the two ends of the rotating plate 21. The two powder discharge plates 31 are respectively connected to the first discharge port 201 and the second discharge port 202. A powder scraping plate 32 is provided on the outer side of the powder discharge plate 31. An auger 33 is rotatably connected inside the box body 20, and a second motor 34 is provided at one end of the auger 33. The output end of the second motor 34 is fixedly connected to the auger 33; a grinding mechanism 40, a grinding mechanism 40 The grinding mechanism 40 is arranged at the bottom of the box body 20, and is located between the two powder outlet plates 31, and is used to grind the powder accumulated by sintering during the blade additive process. The grinding mechanism 40 includes a grinding roller 41 rotatably connected to the bottom of the box body 20, and the grinding roller 41 is transmission-connected to the auger 33; a powder scraping mechanism 50, which is arranged above the grinding mechanism 40 and is used to remove the powder attached to the grinding mechanism 40, and the powder scraping mechanism 50 includes a lifting plate 51 and a powder removal plate 52 slidably connected to the bottom of the box body 20, and a connecting rod 53 is slidably connected between the lifting plate 51 and the powder removal plate 52, and the connecting rod 53 is slidably connected between the lifting plate 51 and the powder removal plate 52. 3 is rotatably connected to the box body 20, and a spring 54 is connected between the lifting plate 51 and the box body 20; a powder collecting mechanism 60, which is arranged on the outer side of the grinding mechanism 40 and is used to collect powder. The powder collecting mechanism 60 includes two powder suction plates 61 respectively arranged on both sides of the grinding mechanism 40, the powder suction plates 61 are located between the grinding mechanism 40 and the powder discharge plate 31, and the powder suction plates 61 are fixedly connected to the bottom of the rotating plate 21. Two return pumps 62 are arranged on the box body 20, and the input end of the return pump 62 is connected to the powder suction plate 61, and the output end of the return pump 62 is connected to the inside of the box body 20.

[0020] It should be noted that the workbench 11 is a prior art, which can drive the blades to descend layer by layer during the additive manufacturing process. It will not be repeated here. A through hole 211 is provided at the bottom of the rotating plate 21 near the scraping mechanism 50, which is used to prevent the rotating plate 21 from interfering with the lifting plate 51 and the powder removal plate 52 during the rotation of the rotating plate 21 along the box body 20.

[0021] When the present invention is in use, when the box 20 moves along the workbench 11, the powder spreading mechanism 30 and the grinding mechanism 40 work to grind and spread the powder. In this process, the second motor 34 works to drive the auger 33 to rotate, and the auger 33 drives the grinding roller 41 to rotate to grind the sintered accumulated powder. The powder inside the box 20 moves to the workbench 11 through the powder outlet plate 31 and is scraped flat by the powder scraper plate 32. After the powder collecting mechanism 60 works, it absorbs the powder flying up when the grinding roller 41 is grinding, and moves the powder to the box 20. After the auger 33 rotates, it also drives the powder to move, so that the powder falls more evenly in the box 20. After the amount of powder attached to the grinding mechanism 40 increases, the lifting plate 51 is lifted up, and the lifting plate 51 drives the powder removal plate 52 to move downward through the connecting rod 53 to scrape off the powder attached to the grinding mechanism 40. The scraped powder is collected by the powder collecting mechanism 6 0 is sucked and moved to the box body 20 for storage, and the second motor 34 is switched to rotate forward or reverse so that the grinding roller 41 rotates clockwise or counterclockwise, which is convenient for two-way grinding, and the auger 33 is also switched to rotate clockwise or counterclockwise, so that the auger 33 drives the falling powder to move evenly to both ends and fall into the box body 20, and the first motor 22 is switched to rotate forward or reverse so that the rotating plate 21 rotates clockwise or counterclockwise, so that when the powder suction plate 61 and the powder discharge plate 31 on one side of the grinding roller 41 are in a connected state, the powder suction plate 61 and the powder discharge plate 31 on the other side of the grinding roller 41 are in a disconnected state, so that in the process of the box body 20 going back and forth, the powder spreading mechanism 30 can spread powder from two directions respectively, and the powder collecting mechanism 60 can absorb powder from two directions respectively, so as to improve the heat dissipation efficiency of the cooling channel of the blade after additive manufacturing.

[0022] Example 2 Reference Figures 1 to 12 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0023] like Figure 3 , Figure 4 and Fig. 9 As shown, a feed port 23 is provided on the top of the box body 20 , and the feed port 23 is located above the middle part of the auger 33 .

[0024] It should be noted that the auger 33 is a prior art and is used to drive the powder to move.

[0025] According to the above structure, the feed port 23 is used to add metal powder into the box 20. When the return pump 62 sucks the powder and moves it into the box 20, the powder first falls on the auger 33. When the auger 33 rotates forward, the auger 33 drives the powder to move to one end of the box 20. When the auger 33 rotates reversely, the auger 33 drives the chalk to move to the other end of the box 20, so that the powder falls more evenly in the box 20.

[0026] like Figure 4 , Figure 7 , Fig.11 and Fig.12 As shown, a material distribution protrusion 24 is provided at the bottom of the box body 20 , and inclined portions 241 are provided on both sides of the material distribution protrusion 24 , and the auger 33 is located above the top of the inclined portion 241 .

[0027] It should be noted that the cross-sectional shape of the material dividing protrusion 24 is similar to a sector, and the point where the top ends of the two inclined portions 241 overlap is the center of the sector.

[0028] According to the above structure, after the powder falls from the auger 33, it moves along the inclined surface 241 to the two sides of the material distribution protrusion 24, so as to facilitate the dispersion of the powder to the first discharge port 201 and the second discharge port 202, thereby avoiding the situation where the powder accumulates at the bottom of the box body 20 and is difficult to be discharged through the first discharge port 201 and the second discharge port 202.

[0029] like Figure 7 , Fig.11 and Fig.12 As shown, a first channel 242 is formed on a side of the material dividing protrusion 24 close to the first material discharge opening 201 , and a second channel 243 is formed on a side of the material dividing protrusion 24 close to the second material discharge opening 202 .

[0030] According to the above structure, the powder suction plate 61 on the side of the grinding roller 41 close to the first feed port 201 is connected to the input end of a return pump 62 through the first channel 242, and the powder suction plate 61 on the side of the grinding roller 41 close to the second feed port 202 is connected to the input end of another return pump 62 through the second channel 243.

[0031] like Figure 3 , Figure 4 and Figure 5 As shown, the grinding mechanism 40 also includes a first pulley 42 fixedly connected to one end of the grinding roller 41 , a second pulley 43 fixedly connected to one end of the auger 33 , and a transmission belt 44 is connected between the first pulley 42 and the second pulley 43 .

[0032] According to the above structure, after the second motor 34 starts working, it drives the auger 33 to rotate, the auger 33 drives the second pulley 43 to rotate, the second pulley 43 drives the first pulley 42 to rotate through the transmission belt 44, and the first pulley 42 drives the grinding roller 41 to rotate, so that after the second motor 34 starts working, it can not only drive the auger 33 to rotate, so that the powder falls evenly, but also can make the grinding roller 41 rotate to grind the sintered accumulated powder.

[0033] like Figure 6 and Fig.10 As shown, both ends of the connecting rod 53 are provided with a strip hole 531, the lifting plate 51 is fixedly connected with a first slide post 511, and the powder removing plate 52 is fixedly connected with a second slide post 521, and the two strip holes 531 are respectively slidably matched with the first slide post 511 and the second slide post 521, and the two strip holes 531 are also respectively rotationally matched with the first slide post 511 and the second slide post 521.

[0034] It should be noted that, in the initial state, under the elastic action of the spring 54 , the lower end of the lifting plate 51 abuts against the top of the grinding roller 41 .

[0035] According to the above structure, when the powder attached to the grinding roller 41 increases and the outer diameter of the grinding roller 41 increases, the top of the grinding roller 41 lifts the lifting plate 51, so that the lifting plate 51 moves upward along the material dividing protrusion 24, and the lifting plate 51 drives the first slide column 511 to move upward, so that the first slide column 511 slides along the strip hole 531 and rotates in the strip hole 531, so that the connecting rod 53 rotates, and the second slide column 521 slides along the strip hole 531 and rotates in the strip hole 531, so that the second slide column 521 drives the powder removal plate 52 to move downward, so that the lower end of the powder removal plate 52 is in contact with the top of the grinding roller 41, so as to facilitate the scraping of the powder attached to the grinding roller 41, wherein the spring 54 facilitates the resetting of the lifting plate 51 and the powder removal plate 52.

[0036] like Fig.11 and Fig.12 As shown, a powder outlet channel 311 is provided inside the powder outlet plate 31 , and when the first discharge port 201 is aligned with one powder outlet channel 311 , the second discharge port 202 is staggered with another powder outlet channel 311 .

[0037] According to the above structure, after the rotating plate 21 rotates along the machine body 10, only one of the two powder outlet channels 311 is connected to the inside of the box body 20, so that when spreading powder in one direction, only the powder outlet plate 31 on the side of the grinding roller 41 away from the powder spreading direction is used for spreading powder. When the powder spreading direction needs to be switched, the connection state of the first discharge port 201 or the second discharge port 202 is switched by rotating the rotating plate 21, so as to switch different powder outlet plates 31 for spreading powder.

[0038] like Fig.11 and Fig.12 As shown, a powder suction channel 611 is provided inside the powder suction plate 61 , and when the first channel 242 is aligned with one powder suction channel 611 , the second channel 243 is staggered with another powder suction channel 611 .

[0039] According to the above structure, after the rotating plate 21 rotates along the body 10, only one of the two powder suction channels 611 is connected to the input end of the return pump 62, so that when grinding in one direction, only the powder suction plate 61 on the side of the grinding roller 41 away from the powder spreading direction absorbs powder. When the powder spreading direction is switched, the rotation direction of the grinding roller 41 also needs to be changed. By rotating the rotating plate 21, the other powder suction plate 61 is connected to the return pump 62 to absorb the flying powder.

[0040] like Fig.11 and Fig.12 As shown, the lower end height of the powder discharge plate 31 is higher than the lower end height of the powder scraper plate 32 , the lower end height of the powder discharge plate 31 is also lower than the lower end height of the powder suction plate 61 , and the lower end height of the powder scraper plate 32 is higher than the lower end height of the grinding roller 41 .

[0041] According to the above structure, the lower end of the powder discharge plate 31 is higher than the lower end of the powder scraper plate 32 and lower than the lower end of the powder suction plate 61, so as to prevent the powder suction plate 61 from sucking the powder spread on the workbench 11 together with the powder. The lower end of the powder scraper plate 32 is higher than the lower end of the grinding roller 41. The height difference between the lower end of the powder scraper plate 32 and the lower end of the grinding roller 41 is the thickness of the spread powder.

[0042] like Fig.11 and Fig.12 As shown, a powder suction port 612 is formed at the lower end of the powder suction plate 61 , and the powder suction port 612 is horizontally facing the grinding roller 41 .

[0043] According to the above structure, the powder suction port 612 is horizontally oriented toward the grinding roller 41 to avoid sucking the powder spread on the workbench 11 .

[0044] The working principle of the present invention is as follows: during the additive manufacturing process of the blade, after one layer of additive manufacturing is completed, the box 20 moves along the workbench 11, so that the grinding mechanism 40 grinds the sintered accumulated powder to reduce the roughness of the blade cooling channel. At the same time, the powder spreading mechanism 30 also spreads powder on the workbench 11, and the powder outlet plates 31 on both sides of the grinding roller 41 are switched to work separately by rotating the rotating plate 21, so as to realize the powder spreading mechanism 30 to spread powder along the powder spreading direction, thereby realizing two-way powder spreading and saving the inter-layer residence time of additive manufacturing. After the rotating plate 21 rotates, the powder suction plates 61 on both sides of the grinding roller 41 are switched to work separately, and the powder collecting mechanism 60 absorbs the powder flying up when the grinding roller 41 is polished and stores it in the box 20 to realize the recycling of powder, and the powder scraping mechanism 50 can scrape off the powder attached to the grinding mechanism 40 as the amount of powder attached to the grinding mechanism 40 increases, thereby improving the grinding efficiency, and then improving the heat dissipation efficiency of the blade cooling channel after additive manufacturing by reducing the roughness of the blade cooling channel.

[0045] 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 gas turbine compressor blades, characterized in that: include: A machine body (10), wherein a workbench (11) is provided inside the machine body (10); A box body (20), the box body (20) being arranged above the workbench (11), the box body (20) being slidably connected to the machine body (10), the bottom of the box body (20) being rotatably connected to a rotating plate (21), the box body (20) being fixedly connected to a first motor (22), the output end of the first motor (22) being fixedly connected to the rotating plate (21), and the bottom ends of the box body (20) being respectively provided with a first material discharge opening (201) and a second material discharge opening (202); a powder spreading mechanism (30), the powder spreading mechanism (30) being arranged at the bottom of the box body (20) and used for bidirectional powder spreading, the powder spreading mechanism (30) comprising a powder discharge plate (31) fixedly connected to the bottom of the rotating plate (21), two powder discharge plates (31) being provided and respectively located at two ends of the rotating plate (21), the two powder discharge plates (31) being respectively connected to the first discharge port (201) and the second discharge port (202), a powder scraping plate (32) being provided on the outer side of the powder discharge plate (31), an auger (33) being rotatably connected inside the box body (20), a second motor (34) being provided at one end of the auger (33), and an output end of the second motor (34) being fixedly connected to the auger (33); A grinding mechanism (40), the grinding mechanism (40) being arranged at the bottom of the box (20), the grinding mechanism (40) being located between two powder outlet plates (31), and being used for grinding sintered and accumulated powder during the blade material addition process, the grinding mechanism (40) comprising a grinding roller (41) rotatably connected to the bottom of the box (20), the grinding roller (41) being drivingly connected to the auger (33); a powder scraping mechanism (50), the powder scraping mechanism (50) being arranged above the grinding mechanism (40) and being used for removing powder attached to the grinding mechanism (40), the powder scraping mechanism (50) comprising a lifting plate (51) and a powder removing plate (52) slidably connected to the bottom of the box (20), a connecting rod (53) being slidably connected between the lifting plate (51) and the powder removing plate (52), the connecting rod (53) being rotatably connected to the box (20), and a spring (54) being connected between the lifting plate (51) and the box (20); a powder collecting mechanism (60), the powder collecting mechanism (60) being arranged outside the grinding mechanism (40) and being used for collecting powder, the powder collecting mechanism (60) comprising two powder suction plates (61) respectively arranged on both sides of the grinding mechanism (40), the powder suction plates (61) being located between the grinding mechanism (40) and the powder discharge plate (31), the powder suction plates (61) being fixedly connected to the bottom of the rotating plate (21), the box body (20) being provided with two return pumps (62), the input end of the return pump (62) being connected to the powder suction plate (61), and the output end of the return pump (62) being connected to the interior of the box body (20); When the box (20) moves along the workbench (11), the second motor (34) rotates forward or reversely so that the grinding mechanism (40) grinds the sintered and accumulated powder in both directions, and the powder collecting mechanism (60) collects the flying powder and moves it into the box (20). After the second motor (34) rotates forward or reversely, the second motor (34) drives the powder to evenly fall into the box (20). After the rotating plate (21) rotates, the connection state between the first discharge port (201) and the second discharge port (202) is switched to realize bidirectional powder spreading. After the powder adheres to the grinding mechanism (40), the outer diameter increases, so that the powder scraping mechanism (50) cleans the grinding mechanism (40) after operation, and the powder collecting mechanism (60) collects the removed powder and moves it into the box (20).

2. The additive manufacturing device for gas turbine compressor blades according to claim 1, characterized in that: A feed inlet (23) is provided on the top of the box body (20), and the feed inlet (23) is located above the middle portion of the auger (33).

3. The additive manufacturing device for gas turbine compressor blades according to claim 2, characterized in that: A material distribution protrusion (24) is provided at the bottom of the box body (20), and inclined portions (241) are provided on both sides of the material distribution protrusion (24), and the auger (33) is located above the top of the inclined portion (241).

4. The additive manufacturing device for gas turbine compressor blades according to claim 3, characterized in that: A first channel (242) is provided on a side of the material distribution protrusion (24) close to the first material discharge opening (201), and a second channel (243) is provided on a side of the material distribution protrusion (24) close to the second material discharge opening (202).

5. The additive manufacturing device for gas turbine compressor blades according to claim 1, characterized in that: The grinding mechanism (40) further comprises a first pulley (42) fixedly connected to one end of the grinding roller (41), a second pulley (43) fixedly connected to one end of the auger (33), and a transmission belt (44) connected between the first pulley (42) and the second pulley (43).

6. The additive manufacturing device for gas turbine compressor blades according to claim 1, characterized in that: Both ends of the connecting rod (53) are provided with strip holes (531); a first sliding column (511) is fixedly connected to the lifting plate (51); a second sliding column (521) is fixedly connected to the powder removal plate (52); the two strip holes (531) are respectively slidably matched with the first sliding column (511) and the second sliding column (521); and the two strip holes (531) are also respectively rotationally matched with the first sliding column (511) and the second sliding column (521).

7. The additive manufacturing device for gas turbine compressor blades according to claim 4, characterized in that: A powder outlet channel (311) is provided inside the powder outlet plate (31), and when the first material outlet port (201) is aligned with one powder outlet channel (311), the second material outlet port (202) is staggered with another powder outlet channel (311).

8. The additive manufacturing device for gas turbine compressor blades according to claim 7, characterized in that: A powder suction channel (611) is provided inside the powder suction plate (61), and when the first channel (242) is aligned with one powder suction channel (611), the second channel (243) is staggered with another powder suction channel (611).

9. The additive manufacturing device for gas turbine compressor blades according to claim 8, characterized in that: The height of the lower end of the powder discharge plate (31) is higher than the height of the lower end of the powder scraping plate (32), the height of the lower end of the powder discharge plate (31) is also lower than the height of the lower end of the powder suction plate (61), and the height of the lower end of the powder scraping plate (32) is higher than the height of the lower end of the grinding roller (41).

10. The additive manufacturing device for gas turbine compressor blades according to claim 9, characterized in that: A powder suction port (612) is provided at the lower end of the powder suction plate (61), and the powder suction port (612) is horizontally oriented toward the grinding roller (41).

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