Martensitic steel layered stacking manufacturing device with heating function

Abstract

The invention relates to the technical field of layered stacking manufacturing, in particular to a martensitic steel layered stacking manufacturing device with a heating function, which comprises a shell, a stirring mechanism arranged on the shell, a powder adding mechanism arranged on the shell, a rotating plate arranged on one side of the shell, an observation plate arranged at the upper end of the rotating plate, and a laser transmitter arranged in the shell. The powder adding mechanism comprises an electric push rod fixed in the shell, and a base plate is arranged at the output end of the electric push rod. The metal powder in the powder storage box is stirred through rotation of the stirring rod, and the situation that when the heating rod preheats the metal powder in the powder storage box, only part of the metal powder makes contact with the heating rod is avoided; the preheating quality of the heating rod on the metal powder in the powder storage box is enhanced, the situation that subsequent heating is affected due to uneven preheating of the metal powder is avoided, the temperature gradient of the metal powder is further reduced, and the stress of produced products is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of layered additive manufacturing, and particularly to a layered additive manufacturing device for martensitic steel with heating. Background Art

[0002] Additive manufacturing technology refers to the process of manufacturing a three-dimensional solid object from a digital model by gradually adding materials layer by layer. Its basic feature is layer-by-layer manufacturing. Metal additive manufacturing is of great significance in metal processing and forming, which can greatly improve processing efficiency, save materials and time.

[0003] When the existing layered additive manufacturing device for steel is in use, it is necessary to preheat the metal powder to reduce the stress of the subsequent produced products. However, preheating the metal powder may result in uneven preheating, leading to a temperature gradient in the metal powder, resulting in more stress remaining in the produced products and thus poor product quality. Summary of the Invention

[0004] The purpose of the present invention is to stir the metal powder inside the powder storage tank by rotating the stirring rod, avoiding only partial contact between the heating rod and the metal powder inside the powder storage tank when preheating the metal powder inside the powder storage tank by the heating rod, enhancing the preheating quality of the heating rod for the metal powder inside the powder storage tank, avoiding uneven preheating of the metal powder and affecting subsequent heating, further reducing the temperature gradient of the metal powder, and reducing the stress of the produced products.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A layered additive manufacturing device for martensitic steel with heating, including a housing, a stirring mechanism is arranged on the housing, a powder adding mechanism is also arranged on the housing, a rotating plate is arranged on one side of the housing, an observation plate is arranged at the upper end of the rotating plate, and a laser emitter is arranged inside the housing;

[0006] The powder adding mechanism includes an electric push rod fixed inside the housing, a substrate is arranged at the output end of the electric push rod, a piston cylinder is arranged at the bottom of the substrate, a drain pipe is communicated with one side of the piston cylinder, a powder feeding plate is arranged on one side of the drain pipe, a temporary storage tank is arranged on one side of the powder feeding plate, a powder feeding pipe is arranged at the upper end of the temporary storage tank, and a filter plate is arranged on one side of the substrate;

[0007] The stirring mechanism includes a reciprocating lead screw inside the housing, a connecting hand is penetrated through the reciprocating lead screw, a scraping plate is arranged on one side of the connecting hand, a rack is arranged at the upper end of the scraping plate, a gear is meshed with one side of the rack, a powder storage tank is arranged at the upper end of the gear, a heating rod is arranged inside the powder storage tank, a rotating piece is arranged at the upper end of the heating rod, and a powder adding pipe is arranged at the upper end of the powder storage tank.

[0008] Preferably, a piston column is arranged at the bottom of the electric push rod, and one side of the piston column is connected with the piston cylinder.

[0009] Preferably, a fixed plate is fixedly arranged inside the drain pipe, a spring is arranged on one side of the fixed plate, and one side of the spring is connected to the powder feeding plate.

[0010] Preferably, the size of the powder feeding plate is adapted to the temporary storage box, a slope is arranged on one side of the temporary storage box, and an inclined surface is arranged at the connection between the upper end of the temporary storage box and the powder feeding pipe.

[0011] Preferably, a baffle is arranged outside the electric push rod, one side of the baffle is connected to the filter plate, a first recovery bin is arranged at the bottom of the filter plate, and a second recovery bin is arranged on one side of the first recovery bin.

[0012] Preferably, telescopic pieces are arranged on both sides of the reciprocating lead screw, and a partition plate is arranged at the upper end of the connecting hand.

[0013] Preferably, a connecting rod is arranged at the upper end of the gear, the connecting rod is connected to the rotating piece, one side of the connecting rod is connected to the heating rod, and a stirring rod is arranged outside the heating rod.

[0014] Preferably, a first groove is arranged inside the powder storage box, and the size of the first groove is adapted to the rotating piece.

[0015] Preferably, a one-way valve is arranged on the powder adding pipe, an inflation device is arranged through the inside of the outer shell, and a powder scraping table is arranged at the bottom of the scraping plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The present invention uses the rotation of the stirring rod to stir the metal powder inside the powder storage box, avoiding that only part of the metal powder contacts the heating rod when the heating rod preheats the metal powder inside the powder storage box, enhancing the preheating quality of the heating rod for the metal powder inside the powder storage box, avoiding uneven preheating of the metal powder and affecting subsequent heating, further reducing the temperature gradient of the metal powder, and reducing the stress of the produced products.

[0018] 2. The present invention heats and melts the metal powder on the substrate according to the data through the laser emitter, thereby processing the metal powder, and according to the different types of metal powder, controlling the descending distance of the electric push rod differently, thereby controlling the metal powder falling from the temporary storage box, avoiding waste caused by blindly adding metal powder and affecting the quality of the product.

[0019] 3. The present invention scrapes the excess metal powder onto the filter plate through the scraping plate for filtration, collects the metal powder with smaller particle sizes into the first recovery bin, and at the same time discharges part of the molten and agglomerated metal powder into the second recovery bin through the scraping plate for collection, which is convenient for subsequent use, separates the directly usable and non-directly usable metal powders, is convenient for subsequent direct use, avoids manual screening of metal powder by workers, and reduces the labor intensity of workers. Description of the Drawings

[0020] Figure 1 Schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram (one) of the partial structure of the powder adding mechanism of the present invention;

[0022] Figure 3 Schematic diagram (two) of the partial structure of the powder adding mechanism of the present invention;

[0023] Figure 4 For the present invention's Figure 3 Enlarged view of part A;

[0024] Figure 5 Schematic diagram (three) of the partial structure of the powder adding mechanism of the present invention;

[0025] Figure 6 Schematic diagram (one) of the partial structure of the stirring mechanism of the present invention;

[0026] Figure 7 Schematic diagram (two) of the partial structure of the stirring mechanism of the present invention;

[0027] Figure 8 For the present invention's Figure 7 Enlarged view of part B.

[0028] In the figure: 1. Outer shell; 11. Observation plate; 12. Rotating plate; 13. Laser emitter; 14. Inflation device; 2. Powder adding mechanism; 21. Electric push rod; 22. Substrate; 23. Piston rod; 24. Piston cylinder; 25. Drain pipe; 26. Temporary storage box; 28. Fixed plate; 29. Spring; 210. Powder feeding plate; 211. Powder feeding pipe; 212. Baffle; 213. Filter plate; 214. First recovery bin; 215. Second recovery bin; 3. Stirring mechanism; 31. Connecting hand; 32. Scraper; 33. Partition plate; 34. Rack; 35. Gear; 36. Connecting rod; 37. Powder storage box; 38. Powder adding pipe; 39. Heating rod; 310. Stirring rod; 311. Rotating piece; 312. Telescopic piece; 313. Reciprocating lead screw; 314. Powder scraping table. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention provides a layered stacking manufacturing device for martensitic steel with heating, including a housing 1, a stirring mechanism 3 is arranged on the housing 1, a powder adding mechanism 2 is also arranged on the housing 1, a rotating plate 12 is arranged on one side of the housing 1, an observation plate 11 is arranged at the upper end of the rotating plate 12, and a laser emitter 13 is also arranged inside the housing 1;

[0031] The powder adding mechanism 2 includes an electric push rod 21 fixed inside the housing 1, the output end of the electric push rod 21 is provided with a substrate 22, a piston cylinder 24 is arranged at the bottom of the substrate 22, a drain pipe 25 is communicated with one side of the piston cylinder 24, a powder feeding plate 210 is arranged on one side of the drain pipe 25, a temporary storage box 26 is arranged on one side of the powder feeding plate 210, a powder feeding pipe 211 is arranged at the upper end of the temporary storage box 26, and a filter plate 213 is arranged on one side of the substrate 22;

[0032] The stirring mechanism 3 includes a reciprocating lead screw 313 inside the housing 1, a connecting hand 31 is penetrated through the reciprocating lead screw 313, a scraping plate 32 is arranged on one side of the connecting hand 31, a rack 34 is arranged at the upper end of the scraping plate 32, a gear 35 is meshed with one side of the rack 34, a powder storage box 37 is arranged at the upper end of the gear 35, a heating rod 39 is arranged inside the powder storage box 37, a rotating piece 311 is arranged at the upper end of the heating rod 39, and a powder adding pipe 38 is arranged at the upper end of the powder storage box 37.

[0033] Before using this device, metal powder is added into the powder storage box 37 through the powder adding pipe 38, and the metal powder is added into the temporary storage box 26 through the powder feeding pipe 211. When starting to work, the electric push rod 21 is started to drive the substrate 22 to move down a certain distance. At the same time, the motor drives the reciprocating lead screw 313 to rotate to drive the connecting hand 31 to move. When the substrate 22 moves down, it drives the piston column 23 to extrude the liquid inside the piston cylinder 24. At the same time, the liquid in the piston cylinder 24 is extruded by the piston column 23, causing the liquid to extrude the powder feeding plate 210 on the other side of the drain pipe 25, resulting in the powder feeding plate 210 moving a certain distance. At the same time, the powder feeding plate 210 moves a certain distance to push out a part of the metal powder inside the temporary storage box 26 onto the powder scraping table 314. At this time, the motor drives the reciprocating lead screw 313 to rotate to drive the connecting hand 31 to move, and the metal powder on the powder scraping table 314 is pushed onto the substrate 22 that has moved down a certain distance. The metal powder on the substrate 22 is heated and melted according to the data by the laser emitter 13, so as to process the metal powder. And according to the different types of metal powder, the distance that the electric push rod 21 moves down is controlled differently, so as to control the metal powder falling from the temporary storage box 26, avoid blindly adding metal powder causing waste and affecting the quality of the product. At the same time, when a product is produced, the electric push rod 21 is extended to its original position, and the liquid in the drain pipe 25 returns to the piston cylinder 24. The powder feeding plate 210 is reset by the pulling force of the spring 29 on the powder feeding plate 210, which is convenient for the next work.

[0034] Meanwhile, the telescopic piece 312 rotates to drive the connecting arm 31 to move. The movement of the connecting arm 31 drives the scraper 32 to move. The movement of the scraper 32 drives the partition plate 33 to move. The movement of the partition plate 33 drives the rack 34 to move. The movement of the rack 34 drives the gear 35 to rotate. The rotation of the gear 35 drives the connecting rod 36 to rotate. The rotation of the connecting rod 36 drives the heating rod 39 to rotate. The rotation of the heating rod 39 drives the stirring rod 310 to rotate. By rotating the stirring rod 310, the metal powder inside the powder storage tank 37 is stirred, preventing only part of the metal powder from contacting the heating rod 39 when the heating rod 39 preheats the metal powder inside the powder storage tank 37, enhancing the preheating quality of the heating rod 39 for the metal powder inside the powder storage tank 37, avoiding uneven preheating of the metal powder and affecting subsequent heating, further reducing the temperature gradient of the metal powder, and reducing the stress of the produced products.

[0035] Meanwhile, the rotation of the reciprocating lead screw 313 drives the connecting arm 31 to move. The movement of the connecting arm 31 drives the scraper 32 to move. The scraper 32 moves to push the metal powder on the powder scraping table 314 onto the substrate 22 for leveling. Meanwhile, when there is more powder added to the temporary storage tank 26, the scraper 32 scrapes the excess metal powder onto the filter plate 213 for filtration. The metal powder with a smaller particle size is collected in the first recovery bin 214. Meanwhile, part of the molten and agglomerated metal powder is discharged by the scraper 32 into the second recovery bin 215 for collection, facilitating subsequent use, separating the directly usable and non-directly usable metal powders, facilitating subsequent direct use, avoiding manual screening of metal powder by workers, and reducing the labor intensity of workers.

[0036] In an alternative embodiment, a piston column 23 is provided at the bottom of the electric push rod 21, and one side of the piston column 23 is connected to the piston cylinder 24.

[0037] It should be noted that the electric push rod 21 drives the substrate 22 to move. When the substrate 22 moves downward, it squeezes the piston column 23, driving the piston column 23 to move inside the piston cylinder 24, squeezing the liquid inside the piston cylinder 24, so that the liquid inside the piston cylinder 24 squeezes the powder feeding plate 210 on the other side through the drain pipe 25 on one side. Meanwhile, one side of the powder feeding plate 210 is fixedly connected to the drain pipe 25 through a spring 29 and a fixing plate 28. Thus, according to the amount of water squeezed out of the piston cylinder 24, the moving distance of the powder feeding plate 210 is controlled, thereby controlling the movement of the powder feeding plate 210 every time the substrate 22 moves downward, and dropping the metal powder in the temporary storage tank 26 onto the powder scraping table 314 through a slope on one side for scraping flat.

[0038] In an alternative embodiment, a fixing plate 28 is fixedly provided inside the drain pipe 25, and a spring 29 is provided on one side of the fixing plate 28. One side of the spring 29 is connected to the powder feeding plate 210.

[0039] It should be noted that the piston column 23 squeezes water into the drain pipe 25 on one side through the piston cylinder 24. At the same time, the water in the drain pipe 25 squeezes the powder feeding plate 210, so as to control the powder feeding plate 210 to extrude the powder in the temporary storage box 26 while the substrate 22 moves downward. After the product is prepared, the substrate 22 is reset to drive the piston column 23 to rise, thereby driving the liquid in the drain pipe 25 to be discharged into the piston cylinder 24. At this time, the spring 29 is in a stretched state. Since the water in the drain pipe 25 decreases, the pulling force of the spring 29 is greater than the pressure of the water on the powder feeding plate 210. Therefore, the pulling force of the spring 29 on the powder feeding plate 210 resets the powder feeding plate 210, and preheated metal powder is added to the temporary storage box 26 again, which is convenient for manufacturing the next product.

[0040] In an alternative embodiment, the size of the powder feeding plate 210 is adapted to the temporary storage box 26. A slope is provided on one side of the temporary storage box 26, and an inclined surface is provided at the connection between the upper end of the temporary storage box 26 and the powder feeding pipe 211.

[0041] It should be noted that the powder feeding plate 210 moves to squeeze the metal powder inside the temporary storage box 26. At the same time, the powder squeezed to one end of the slope leaves the temporary storage box 26 through the slope during the subsequent extrusion process. The slope is used to prevent the metal powder from naturally falling from one side when it accumulates, thereby affecting the control effect of the amount of the falling metal powder by the device. At the same time, the inclined surface at the connection between the upper end of the temporary storage box 26 and the powder feeding pipe 211 is used to prevent the powder added to the inside of the temporary storage box 26 from blocking the column connection, resulting in the inside of the temporary storage box 26 not being completely filled with powder, thereby affecting the amount of powder added during subsequent processing.

[0042] In an alternative embodiment, a baffle 212 is provided outside the electric push rod 21. One side of the baffle 212 is connected to the filter plate 213, and a first recovery bin 214 is provided at the bottom of the filter plate 213. A second recovery bin 215 is provided on one side of the first recovery bin 214.

[0043] It should be noted that when the electric push rod 21 drives the substrate 22 to move downward, the substrate 22 is retracted into the baffle 212. The baffle 212 supports and protects the semi-finished products and metal powder on the substrate 22, preventing the metal powder on the substrate 22 from moving when moving, thereby driving the product on the substrate 22 to move, which affects the subsequent work. At the same time, when the scraper 32 moves, it levels the powder on the powder scraping table 314 on the substrate 22. At the same time, if too much powder is added, the scraper 32 pushes the excess powder onto the filter plate 213. The metal powder is filtered into the first recovery bin 214 through the filter plate 213 for collection for subsequent use. At the same time, some molten and agglomerated powder is continuously pushed by the scraper 32 into the second recovery bin 215 for collection, avoiding manual screening of the metal powder, reducing the labor intensity of the staff, and at the same time preventing the metal powder from being inhaled by the staff, causing physical harm to the staff.

[0044] In an alternative embodiment, telescopic pieces 312 are arranged on both sides of the reciprocating lead screw 313, and a partition plate 33 is arranged at the upper end of the connecting arm 31.

[0045] It should be noted that when the reciprocating lead screw 313 moves, it drives the connecting arm 31 to move. When the connecting arm 31 moves, it squeezes one side of the telescopic piece 312 and stretches the telescopic piece 312 on the other side. At the same time, the reciprocating lead screw 313 is protected inside the housing 1 to prevent some metal powder from staying on the reciprocating lead screw 313 when the connecting arm 31 moves, which affects the normal operation of the reciprocating lead screw 313, thus affecting the rotation of the reciprocating lead screw 313, resulting in an error in the leveling of the scraper 32, and further reducing the quality of the product. At the same time, a partition plate 33 is arranged on the connecting arm 31 to prevent the added powder from falling to the other side of the scraper 32, resulting in insufficient powder required for leveling and reducing the product quality.

[0046] In an alternative embodiment, a connecting rod 36 is arranged at the upper end of the gear 35. The connecting rod 36 is connected to the rotating piece 311. One side of the connecting rod 36 is connected to the heating rod 39, and a stirring rod 310 is arranged outside the heating rod 39.

[0047] It should be noted that the movement of the scraper 32 drives the movement of the partition plate 33. The movement of the partition plate 33 drives the movement of the rack 34. The movement of the rack 34 drives the rotation of the gear 35. The rotation of the gear 35 drives the rotation of the connecting rod 36. The rotation of the connecting rod 36 drives the rotation of the heating rod 39. The rotation of the heating rod 39 drives the rotation of the stirring rod 310. The rotation of the stirring rod 310 stirs the metal powder inside the powder storage tank 37, enhancing the preheating effect of the heating rod 39 on the metal powder, enabling the metal powder inside the powder storage tank 37 to be in full contact with the heating rod 39, and preventing the insufficient preheating of the metal powder from reducing the product quality.

[0048] In an alternative embodiment, a first groove is arranged inside the powder storage tank 37, and the size of the first groove is adapted to the rotating piece 311.

[0049] It should be noted that the upper end of the connecting rod 36 is connected to the rotating piece 311, enabling the connecting rod 36 to rotate inside the powder storage tank 37. At the same time, the rotation of the connecting rod 36 drives the rotating piece 311 to rotate inside the first groove inside the powder storage tank 37, limiting the connecting rod 36 to prevent it from disengaging during rotation.

[0050] In an alternative embodiment, a one-way valve is arranged on the powder adding pipe 38, an inflation device 14 is arranged through the housing 1, and a powder scraping platform 314 is arranged at the bottom of the scraper 32.

[0051] It should be noted that the protective gas is filled into the housing 1 through the inflation device 14, and the interior of the housing 1 is in a closed environment through the powder adding pipe 38. At the same time, the metal powder extruded from the temporary storage tank 26 falls onto the upper end of the powder scraping table 314.

[0052] Working principle: Before using this device, metal powder is added into the powder storage tank 37 through the powder adding pipe 38. The metal powder is added into the temporary storage tank 26 through the powder feeding pipe 211. When starting to work, by starting the electric push rod 21, the substrate 22 is driven to move downward by a certain distance. At the same time, the motor drives the reciprocating lead screw 313 to rotate to drive the connecting hand 31 to move. When the substrate 22 moves downward, the piston column 23 drives the liquid inside the piston cylinder 24 to be extruded. At the same time, the liquid in the piston cylinder 24 is extruded by the piston column 23, resulting in the liquid extruding the powder feeding plate 210 on the other side of the drain pipe 25, causing the powder feeding plate 210 to move a certain distance. At the same time, the powder feeding plate 210 moves a certain distance to push a part of the metal powder inside the temporary storage tank 26 onto the powder scraping table 314. At this time, the motor drives the reciprocating lead screw 313 to rotate to drive the connecting hand 31 to move, and the metal powder on the powder scraping table 314 is pushed onto the substrate 22 that has moved downward by a certain distance. The metal powder on the substrate 22 is heated and melted according to the data by the laser emitter 13, so as to process the metal powder. And according to the different types of metal powder, the distance that the electric push rod 21 moves downward is controlled differently, so as to control the metal powder falling from the temporary storage tank 26, avoid waste caused by blindly adding metal powder, and affect the quality of the product. At the same time, when a product is produced, the electric push rod 21 is extended to its original position, and the liquid in the drain pipe 25 returns to the piston cylinder 24. The powder feeding plate 210 is reset by the pulling force of the spring 29 on the powder feeding plate 210, which is convenient for the next work.

[0053] At the same time, the telescopic piece 312 rotates to drive the connecting hand 31 to move. The connecting hand 31 moves to drive the scraping plate 32 to move. The scraping plate 32 moves to drive the partition plate 33 to move. The partition plate 33 moves to drive the rack 34 to move. The rack 34 moves to drive the gear 35 to rotate. The gear 35 rotates to drive the connecting rod 36 to rotate. The connecting rod 36 rotates to drive the heating rod 39 to rotate. The heating rod 39 rotates to drive the stirring rod 310 to rotate. The metal powder inside the powder storage tank 37 is stirred by the rotation of the stirring rod 310, avoiding that only part of the metal powder contacts the heating rod 39 when the heating rod 39 preheats the metal powder inside the powder storage tank 37, enhancing the preheating quality of the heating rod 39 for the metal powder inside the powder storage tank 37, avoiding uneven preheating of the metal powder and affecting subsequent heating, further reducing the temperature gradient of the metal powder, and reducing the stress of the produced product.

[0054] Meanwhile, the reciprocating screw rod 313 rotates to drive the connecting arm 31 to move. The movement of the connecting arm 31 drives the scraper 32 to move. The movement of the scraper 32 pushes the metal powder on the powder scraping table 314 onto the substrate 22 for leveling. At the same time, when there is more powder added to the temporary storage box 26, the scraper 32 sweeps the excess metal powder onto the filter plate 213 for filtration. The metal powder with smaller particle size is collected in the first recovery bin 214. At the same time, some of the molten and agglomerated metal powder is discharged by the scraper 32 into the second recovery bin 215 for collection, which is convenient for subsequent use. The directly usable and non-directly usable metal powders are separated, which is convenient for subsequent direct use and avoids manual screening of metal powder by workers, reducing the labor intensity of workers.

[0055] The powder feeding plate 210 moves to extrude the metal powder inside the temporary storage box 26. At the same time, the powder extruded to one end of the slope leaves the temporary storage box 26 through the slope during the subsequent extrusion process. The slope is used to prevent the metal powder from naturally falling from one side when it accumulates, thus affecting the control effect of the device on the amount of the falling metal powder. At the same time, the slope at the connection between the upper end of the temporary storage box 26 and the powder feeding pipe 211 is used to prevent the powder added to the inside of the temporary storage box 26 from blocking the column connection, resulting in the inside of the temporary storage box 26 not being completely filled with powder, thus affecting the amount of powder added during subsequent processing. When the electric push rod 21 drives the substrate 22 to move downward, the substrate 22 is retracted into the baffle 212. The baffle 212 supports and protects the semi-finished products and metal powder on the substrate 22, preventing the metal powder on the substrate 22 from moving when moving, thus driving the products on the substrate 22 to move and affecting the subsequent work. The upper end of the connecting rod 36 is connected to the rotating piece 311, so that the connecting rod 36 rotates inside the powder storage box 37. At the same time, the rotation of the connecting rod 36 drives the rotating piece 311 to rotate inside the first groove inside the powder storage box 37 to limit the connecting rod 36 and prevent it from disengaging when rotating. The protective gas is filled into the housing 1 through the gas filling device 14, and the inside of the housing 1 is in a sealed environment through the powder adding pipe 38.

[0056] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A layered stacking manufacturing device for martensitic steel with heating, comprising a housing (1), characterized in that, A stirring mechanism (3) is provided on the outer shell (1), a powder adding mechanism (2) is also provided on the outer shell (1), a rotating plate (12) is provided on one side of the outer shell (1), an observation plate (11) is provided at the upper end of the rotating plate (12), and a laser emitter (13) is also provided inside the outer shell (1). The powder adding mechanism (2) includes an electric push rod (21) fixed inside the outer shell (1), a substrate (22) is provided at the output end of the electric push rod (21), a piston cylinder (24) is provided at the bottom of the substrate (22), a drain pipe (25) is communicated with one side of the piston cylinder (24), a powder feeding plate (210) is provided on one side of the drain pipe (25), a temporary storage box (26) is provided on one side of the powder feeding plate (210), a powder feeding pipe (211) is provided at the upper end of the temporary storage box (26), and a filter plate (213) is provided on one side of the substrate (22). The stirring mechanism (3) includes a reciprocating lead screw (313) inside the outer shell (1), a connecting hand (31) is penetrated through the reciprocating lead screw (313), a scraping plate (32) is provided on one side of the connecting hand (31), a rack (34) is provided at the upper end of the scraping plate (32), a gear (35) is meshed with one side of the rack (34), a powder storage box (37) is provided at the upper end of the gear (35), a heating rod (39) is provided inside the powder storage box (37), a rotating piece (311) is provided at the upper end of the heating rod (39), and a powder adding pipe (38) is provided at the upper end of the powder storage box (37).

2. The layered stacking manufacturing device for a martensitic steel with heating according to claim 1, wherein A piston column (23) is provided at the bottom of the electric push rod (21), and one side of the piston column (23) is connected with the piston cylinder (24).

3. The layered stacking manufacturing device for martensitic steel with heating according to claim 1, characterized in that, A fixing plate (28) is fixedly provided inside the drain pipe (25), a spring (29) is provided on one side of the fixing plate (28), and one side of the spring (29) is connected with the powder feeding plate (210).

4. A layered stacking manufacturing device for a heatable martensitic steel, characterized in that, The size of the powder feeding plate (210) is adapted to the temporary storage box (26), a slope is provided on one side of the temporary storage box (26), and an inclined surface is provided at the connection part of the upper end of the temporary storage box (26) and the powder feeding pipe (211).

5. A layered stacking manufacturing device for a heatable martensitic steel, characterized in that, A baffle (212) is provided outside the electric push rod (21), one side of the baffle (212) is connected with the filter plate (213), a first recovery bin (214) is provided at the bottom of the filter plate (213), and a second recovery bin (215) is provided on one side of the first recovery bin (214).

6. The layered stacking manufacturing device for martensitic steel with heating according to claim 5, characterized in that, Expansion pieces (312) are provided on both sides of the reciprocating lead screw (313), and a partition plate (33) is provided at the upper end of the connecting hand (31).

7. The layered stacking manufacturing device for martensitic steel with heating according to claim 1, characterized in that, A connecting rod (36) is provided at the upper end of the gear (35), the connecting rod (36) is connected with the rotating piece (311), one side of the connecting rod (36) is connected with the heating rod (39), and a stirring rod (310) is provided outside the heating rod (39).

8. A layered stacking manufacturing device for a martensitic steel with heating according to claim 1, characterized in that, A first groove is provided inside the powder storage box (37), and the size of the first groove is adapted to the rotating piece (311).

9. The layered stacking manufacturing device for martensitic steel with heating according to claim 1, wherein, A one-way valve is provided on the powder adding tube (38), an inflation device (14) is disposed through the interior of the housing (1), and a powder scraping table (314) is provided at the bottom of the scraping blade (32).

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