Ceramic metal composite grinding roller additive manufacturing device and method

Abstract

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing device and method for a ceramic metal composite grinding roller. Comprising a connecting frame; a preheating tank is installed on the connecting frame, a T-shaped base is connected to the side wall of the preheating tank, and an air producing and heat drying device is arranged on the T-shaped base and used for feeding produced hot air into the preheating tank to heat metal powder in the preheating tank. The wind-making and heat-drying device comprises a brake L seat mounted at the bottom of the T-shaped base, two symmetrical brake sliding columns are mounted at the top of the brake L seat in a penetrating manner, and the brake sliding columns are in sliding fit with the brake L seat; original large blocks are divided into small particles, the flowability and smoothness of metal powder are improved, meanwhile, the metal powder can be evenly heated, a metal powder layer can be evenly laid when the metal powder is used for additive manufacturing, the difference between melting and solidification of the metal powder is avoided, and the product quality is improved. And the forming effect of the device and the size precision and the surface quality of a formed workpiece are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing device and method for a ceramic-metal composite grinding roll. Background Art

[0002] Additive manufacturing, commonly known as 3D printing, integrates computer-aided design, material processing and forming technologies. Based on digital model files, through software and numerical control systems, special metal materials, non-metal materials and medical biological materials are stacked layer by layer in ways such as extrusion, sintering, melting, photocuring, spraying, etc. to manufacture solid objects; most of the raw materials used in manufacturing are in powder form. In order to improve the powder fluidity, remove moisture and volatiles, it is necessary to preheat the raw materials used so that the raw materials are in the best state when used by the device to improve the manufacturing quality of the device.

[0003] However, when the existing additive manufacturing device produces composite grinding rolls, before the metal powder is heated, it is easily agglomerated due to factors such as humidity. The heat transfer inside the agglomerated metal powder is blocked, making it difficult for heat to be evenly transferred to each particle. The metal powder in the center of the agglomerate will not reach the expected heating effect due to insufficient heat, making it difficult to evenly heat the metal powder. When it is used in manufacturing, it will affect the forming accuracy of the workpiece, resulting in uneven thickness of the powder layer laid, obvious differences in melting and solidification degrees, affecting the dimensional accuracy and surface quality of the workpiece, and at the same time reducing the forming effect of the device. Summary of the Invention

[0004] In view of the above situation, to overcome the defects of the prior art, the present invention provides an additive manufacturing device and method for a ceramic-metal composite grinding roll, effectively solving the problems in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: An additive manufacturing device for a ceramic-metal composite grinding roll, including a connecting frame; a preheating tank is installed on the connecting frame, a T-shaped base is connected to the side wall of the preheating tank, and a hot air generating and drying device is arranged on the T-shaped base. The hot air generating and drying device is used to send the generated hot air into the preheating tank to heat the metal powder inside it; the hot air generating and drying device includes a braking L seat installed at the bottom of the T-shaped base, two symmetric braking sliding columns are installed through the top of the braking L seat, and the braking sliding columns are slidably matched with the braking L seat; the tops of the two braking sliding columns are commonly connected to a braking cross block; T-shaped racks are installed on both sides of the braking cross block, and a driving gear and a rotating gear are respectively meshed and connected to the opposite sides of the two T-shaped racks; a swirling and throwing component is arranged on the rotating gear, and the swirling and throwing component is used to break up the agglomerates in the metal powder; a double-striking and flow-dredging mechanism is arranged on the driving gear, and the double-striking and flow-dredging mechanism is used to improve the flow performance of the metal powder during feeding and discharging.

[0006] Preferably, a braking spring is sleeved on the braking sliding column. One end of the braking spring is fixedly connected to the braking cross block, and the other end is fixedly connected to the braking L seat. The ends of the two braking sliding columns away from the braking cross block are commonly connected to a braking square plate. A retaining frame is further installed on the braking L seat, and a gas-making square box is installed within the retaining frame. The retaining frame is located within the gas-making square box and the two are in sliding fit. An air exchange groove is provided at the bottom of the gas-making square box, and an air exchange valve is installed within the air exchange groove. A through connection groove is provided on the outer sidewall of the preheating tank, and a connection valve is installed within the connection groove.

[0007] Preferably, an air outlet groove is provided on the side of the gas-making square box away from the preheating tank. The air outlet groove is located between the air exchange groove and the braking square plate. An air outlet valve is further installed within the air outlet groove. An air delivery square pipe is further installed on the gas-making square box. One end of the air delivery square pipe is communicated with the air outlet groove. The other end of the air delivery square pipe is installed at the outer sidewall of the preheating tank and is communicated with the connection groove. A plurality of heating modules are installed at the inner wall of the air delivery square pipe. A driving motor is further installed on the side of the T-shaped base away from the preheating tank. A driving cam is installed at the output end of the driving motor, and the top of the braking cross block is located at the rotation path of the sidewall of the driving cam.

[0008] Preferably, the swirling and throwing component includes a rotating shaft installed on the rotating gear. A rotating fixing seat is connected to the rotating shaft, and the rotating fixing seat is fixedly installed on the retaining frame. A rotating bevel gear is installed at the end of the rotating shaft away from the rotating gear. The rotating bevel gear is meshed and connected to an auxiliary bevel gear. An auxiliary rotating shaft is installed on the auxiliary bevel gear. A first pulley is further installed at the end of the auxiliary rotating shaft away from the auxiliary bevel gear, and one end of a transmission belt is connected to the first pulley.

[0009] Preferably, the other end of the transmission belt is connected to a second pulley. The second pulley and the first pulley are in sliding fit with the transmission belt. A stirring rotating shaft is installed on the side of the second pulley close to the preheating tank. The stirring rotating shaft and the auxiliary rotating shaft are commonly connected to an auxiliary base, and the auxiliary base is fixedly installed on the preheating tank. A swirling fan blade is installed at the end point of the stirring rotating shaft within the preheating tank. The central rotating shaft of the swirling fan blade is parallel to the bottom of the preheating tank and the swirling fan blade faces the inner sidewall of the preheating tank.

[0010] Preferably, a feed inlet and a discharge outlet are respectively provided at the top and bottom of the outer sidewall of the preheating tank. Spiraling crushing pipes are installed at the feed inlet and the discharge outlet, and the crushing pipes are located within the preheating tank. The inner wall of the crushing pipe is provided with a spiral groove.

[0011] Preferably, the double-striking and flow-dredging mechanism includes a driving rotating shaft installed on the driving gear. One end of the driving rotating shaft passes through the rotating fixing seat and is connected with a driving turntable. A driving cylinder is installed at the edge of the side of the driving turntable away from the driving rotating shaft. A driving torque block is further arranged on the side surface of the driving turntable. A through rectangular sliding groove is arranged on the side of the driving torque block close to the driving turntable. The rectangular sliding groove is in sliding fit with the driving cylinder. Two symmetric positioning cylinders are installed on the top of the driving torque block. The two positioning cylinders are jointly and slidably connected with a positioning base, and the positioning base is installed on the rotating fixing seat.

[0012] Preferably, a positioning ring is arranged in the preheating tank. A plurality of double-striking cylinders are arranged on the side of the positioning ring close to the crushing pipe. A double-striking ball column is slidably connected in the double-striking cylinder. The crushing pipe is located on the moving path of the double-striking ball column. A double-striking spring is arranged in the double-striking cylinder. One end of the double-striking spring is fixedly connected to the end point of the double-striking ball column located in the double-striking cylinder, and the other end is fixedly connected to the inner bottom surface of the double-striking cylinder. One end of a bent square rod is installed on the positioning cylinder. The other end of the bent square rod passes through the preheating tank and is connected with the positioning ring.

[0013] Preferably, a material-pushing anti-sticking unit is further arranged on the second pulley. The material-pushing anti-sticking unit includes a displacement screw rod installed on the side of the second pulley away from the preheating tank. One end of the displacement screw rod away from the second pulley is installed with a displacement base, and the displacement base is fixedly installed at the preheating tank. A displacement square block is threadedly connected to the displacement screw rod. A displacement cylinder is slidably connected to the displacement square block, and the displacement cylinder is fixedly installed on the displacement base. A linkage square rod is connected to the displacement square block. The linkage square rod is connected with a scraping block, and the scraping block is located in the preheating tank and contacts its bottom.

[0014] The present invention also provides a method for additive manufacturing of a ceramic-metal composite grinding roll, including the following steps: S1. Feed the metal powder required for manufacturing the workpiece into the preheating tank for heat treatment to reduce the friction and adhesion between particles so that the flow of the metal powder can be smooth. S2. Operate the swirling and throwing component to disperse the agglomerates in the metal powder so that the heat can be evenly transferred to each particle.

[0015] As can be seen from the above, the additive manufacturing device for the ceramic-metal composite grinding roll provided by the present invention can turn the originally larger agglomerates into smaller particles, not only improving the fluidity and smoothness of the metal powder, but also preventing the metal powder entering the preheating tank from the crushing pipe from agglomerating. During the heating process, the heat can be evenly transferred to each particle, so that the metal powder can be evenly heated. When it is used for additive manufacturing, the metal powder layer can be evenly laid, avoiding obvious differences in the melting and solidification of the metal powder, and improving the forming effect of the device, the dimensional accuracy of the formed workpiece and the surface quality. Brief Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0017] In the drawings: Figure 1 is one of the schematic diagrams of the overall structure of the present invention; Figure 2 is the schematic diagram of the structure of the shredding pipe of the present invention; Figure 3 is the cross-sectional view of the air delivery square pipe of the present invention; Figure 4 is the schematic diagram of the structure of the scraping block of the present invention; Figure 5 is the schematic diagram of the structure of the double-striking ball post of the present invention; Figure 6 is the second schematic diagram of the overall structure of the present invention; Figure 7 is the schematic diagram of the structure of the driving cam of the present invention; Figure 8 is the schematic diagram of the structure of the rotating fan blade of the present invention; Figure 9 is the schematic diagram of the structure of the T-shaped rack of the present invention; Figure 10 is the schematic diagram of the structure of the braking cross block of the present invention; Figure 11 is the schematic diagram of the structure of the driving torque block of the present invention; In the figures: 1, connecting frame; 2, preheating tank; 3, T-shaped base; 4, braking L seat; 5, braking sliding column; 6, braking cross block; 7, T-shaped rack; 8, driving gear; 9, rotating gear; 10, braking spring; 11, braking square plate; 12, retaining frame; 13, gas-making square box; 14, air exchange groove; 15, connecting groove; 16, air outlet groove; 17, air delivery square pipe; 18, heating module; 19, driving motor; 20, driving cam; 21, rotating shaft; 22, rotating fixing seat; 23, rotating bevel gear; 24, auxiliary bevel gear; 25, auxiliary rotating shaft; 26, first pulley; 27, transmission belt; 28, second pulley; 29, stirring rotating shaft; 30, auxiliary base; 31, rotating fan blade; 32, shredding pipe; 33, driving rotating shaft; 34, driving turntable; 35, driving cylinder; 36, driving torque block; 37, rectangular sliding groove; 38, positioning cylinder; 39, positioning base; 40, positioning ring; 41, double-striking cylinder; 42, double-striking ball post; 43, double-striking spring; 44, bent square rod; 45, displacement lead screw; 46, displacement base; 47, displacement square block; 48, displacement cylinder; 49, linkage square rod; 50, scraping block. Detailed Description of the Invention

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Example, by Figures 1 to 11 The present invention comprises a connecting frame 1; a preheating tank 2 is installed on the connecting frame 1, and the preheating tank 2 itself has a heating function, and a T-shaped base 3 is connected to the side wall of the preheating tank 2, and a wind-making heat-drying device is arranged on the T-shaped base 3, and the wind-making heat-drying device is used to send the produced hot air into the preheating tank 2 to heat the metal powder inside it; the wind-making heat-drying device comprises a brake L seat 4 installed at the bottom of the T-shaped base 3, and two symmetrical brake slide posts 5 are installed on the top of the brake L seat 4, and the brake slide posts 5 are slidably matched with the brake L seat 4; the tops of the two brake slide posts 5 are commonly connected to a brake cross block 6; the brake cross block 6 T-shaped racks 7 are installed on both sides, and the opposite back surfaces of the two T-shaped racks 7 are respectively meshed and connected with a driving gear 8 and a rotating gear 9; a rotary throwing assembly is arranged on the rotating gear 9, and the rotary throwing assembly is used to break up the agglomerates in the metal powder; a re-impacting and dredging mechanism is arranged on the driving gear 8, and the re-impacting and dredging mechanism is used to improve the flow performance of the metal powder during loading and unloading; a feed port and a discharge port are respectively arranged at the top and bottom of the outer wall of the preheating tank 2, and a spiral crushing pipe 32 is installed at the feed port and the discharge port, and the crushing pipe 32 is located in the preheating tank 2; the inner wall of the crushing pipe 32 is arranged with a spiral groove; When the device performs additive manufacturing on the composite grinding roller, the required metal powder raw material is fed into the preheating tank 2 through the feed port for heating. When the raw material enters the preheating tank 2 through the feed port, it will enter the crushing pipe 32, and the metal powder is sent into the tank by the crushing pipe 32. At this time, the metal powder will flow in the crushing pipe 32, and the inner wall of the crushing pipe 32 is spiral-shaped, guiding the movement of the powder, so that the metal powder obtains a rotating trend when flowing in the pipe, making the metal powder rotate in the crushing pipe 32. If there are some agglomerated particles in these metal powders, the agglomerates will continuously collide with the inner wall of the crushing pipe 32 during the above rotation process. Since the structure of the agglomerated powder itself is relatively loose, it will be broken under the action of multiple impacts with the inner wall of the pipe, so that the original larger agglomerates become smaller particles, which not only improves the fluidity and smoothness of the metal powder, but also makes the metal powder entering the preheating tank 2 from the crushing pipe 32 avoid agglomeration, so that the heat can be evenly transferred to each particle during the heating process of the metal powder, so that the metal powder can be evenly heated, so that when it is used for additive manufacturing, the metal powder layer can be evenly laid, avoiding obvious differences in the melting and solidification of the metal powder, and improving the forming effect of the device, the dimensional accuracy of the formed workpiece and the surface quality.

[0020] A brake spring 10 is sleeved on the brake slide column 5. One end of the brake spring 10 is fixedly connected with the brake cross block 6, and the other end is fixedly connected with the brake L seat 4; the two ends of the brake slide column 5 far from the brake cross block 6 are jointly connected with a brake square plate 11; a retaining frame 12 is also installed on the brake L seat 4, and a gas-making square box 13 is installed in the retaining frame 12; the retaining frame 12 is located in the gas-making square box 13 and the two are slidably matched; a ventilation groove 14 is provided at the bottom of the gas-making square box 13, and a ventilation valve is installed in the ventilation groove 14; a through connection groove 15 is provided on the outer side wall of the preheating tank 2, and a connection valve is installed in the connection groove 15; an air outlet groove 16 is provided on the side of the gas-making square box 13 far from the preheating tank 2, and the air outlet groove 16 is located between the ventilation groove 14 and the brake square plate 11; an air outlet valve is also installed in the air outlet groove 16; an air delivery square pipe 17 is also installed on the gas-making square box 13, and one end of the air delivery square pipe 17 is communicated with the air outlet groove 16; the other end of the air delivery square pipe 17 is installed on the outer side wall of the preheating tank 2 and is communicated with the connection groove 15; a plurality of heating modules 18 are installed on the inner wall of the air delivery square pipe 17; a driving motor 19 is also installed on the side of the T-shaped base 3 far from the preheating tank 2, a driving cam 20 is installed on the output end of the driving motor 19, and the top of the brake cross block 6 is located on the rotation path of the side wall of the driving cam 20; By starting the driving motor 19, the output end thereof drives the driving cam 20 to continuously rotate, and then its side wall continuously contacts the top of the braking cross block 6; when the driving cam 20 contacts the top of the braking cross block 6, it will exert a downward pressure on it, causing the braking cross block 6 to be limitedly moved on the braking L seat 4 through the braking slide column 5, and then the braking spring 10 is in a buffered state, driving the braking square plate 11 to move; when the driving cam 20 does not contact the braking cross block 6, it no longer exerts a downward pressure on it, causing the braking spring 10 in the buffered state to be reset, and then driving the braking square plate 11 to reset and rotate, so that the braking square plate 11 reciprocates in the air-making square box 13; when the braking square plate 11 moves downward, it will squeeze the gas in the air-making square box 13. At this time, the air-changing valve is in a closed state, while the connecting valve and the air outlet valve are in an open state. Then, the gas squeezed in the air-making square box 13 is sent into the connecting groove 15 through the air outlet groove 16 and the air delivery square pipe 17, and the above gas is sent into the preheating tank 2. There are multiple heating modules in the air delivery square pipe 17, so that the gas entering the air delivery square pipe 17 will be heated by the heating modules and then sent into the preheating tank 2. That is to say, the gas entering the preheating tank 2 is hot gas, which can heat the metal powder flowing into the preheating tank 2, so that the metal powder can be preheated to a suitable temperature for additive manufacturing operations. After being preheated, the metal powder can reduce the friction and adhesion between particles, making the powder more fluid and improving the forming and use effects of the device.

[0021] The swirling and throwing component of this embodiment includes a rotating shaft 21 installed on the rotating gear 9. A rotating fixed seat 22 is connected to the rotating shaft 21, and the rotating fixed seat 22 is fixedly installed on the retaining frame 12; a rotating bevel gear 23 is installed at one end of the rotating shaft 21 away from the rotating gear 9. The rotating bevel gear 23 is meshed and connected with an auxiliary bevel gear 24. An auxiliary rotating shaft 25 is installed on the auxiliary bevel gear 24. At one end of the auxiliary rotating shaft 25 away from the auxiliary bevel gear 24, a first pulley 26 is also installed, and one end of a transmission belt 27 is connected to the first pulley 26; the other end of the transmission belt 27 is connected to a second pulley 28, and the second pulley 28 and the first pulley 26 are slidably matched with the transmission belt 27; a stirring rotating shaft 29 is installed on the side of the second pulley 28 close to the preheating tank 2. The stirring rotating shaft 29 and the auxiliary rotating shaft 25 are jointly connected to an auxiliary base 30, and the auxiliary base 30 is fixedly installed on the preheating tank 2; a swirling fan blade 31 is installed at the end point of the stirring rotating shaft 29 located inside the preheating tank 2. The central rotating shaft of the swirling fan blade 31 is parallel to the bottom of the preheating tank 2 and the swirling fan blade 31 faces the inner side wall of the preheating tank 2; When the braking cross block 6 reciprocates, it will also drive the T-shaped rack 7 to reciprocate, causing it to continuously engage and rotate the rotating gear 9. Under the action of the rotating shaft 21, the rotating bevel gear 23 is driven to rotate, enabling it to engage and drive the auxiliary bevel gear 24 to rotate. Under the action of the auxiliary rotating shaft 25, the first pulley 26 is driven to rotate. It drives the second pulley 28 to rotate through the transmission belt 27, causing the stirring shaft 29 on it to reciprocate in the preheating tank 2. At the end point of the stirring shaft 29 located in the preheating tank 2, a rotating fan blade 31 is also installed. The rotating fan blade 31 continuously stirs the metal powder in the preheating tank 2, dispersing the agglomerated powder existing in the metal powder, enabling the heating amount to be evenly transferred to each particle, improving the uniformity of the device for heating the metal powder, avoiding the influence of the agglomerated powder on its fluidity, and improving the use effect of the device. At the same time, the central rotating shaft of the rotating fan blade 31 is arranged parallel to the bottom of the preheating tank 2 and the rotating fan blade 31 faces the inner side wall of the preheating tank 2, enabling the rotating fan blade 31 to continuously scoop up the metal powder and throw it into the air to freely fall, causing several particles to be continuously lifted and dropped, enabling them to be evenly heated by the hot air sent in, transferring the heat to each particle, avoiding the accumulation of metal powder together, which affects the heat transfer and causes the powder in some local areas to be difficult to be heated, improving the heating effect of the device on the metal powder, and also improving the quality of the device when forming workpieces.

[0022] The double-striking flow-dispersing mechanism of this embodiment includes a driving rotating shaft 33 installed on the driving gear 8. One end of the driving rotating shaft 33 passes through the rotating fixing seat 22 and is connected with a driving turntable 34. A driving cylinder 35 is installed at the side edge of the driving turntable 34 away from the driving rotating shaft 33. A driving torque block 36 is also provided on the side surface of the driving turntable 34. A through rectangular sliding groove 37 is provided on the side of the driving torque block 36 close to the driving turntable 34, and the rectangular sliding groove 37 is slidably matched with the driving cylinder 35. Two symmetric positioning cylinders 38 are installed on the top of the driving torque block 36. The two positioning cylinders 38 are jointly slidably connected with a positioning base 39, and the positioning base 39 is installed on the rotating fixing seat 22. A positioning ring 40 is provided in the preheating tank 2. A plurality of double-striking cylinders 41 are provided on the side of the positioning ring 40 close to the material crushing pipe 32. A double-striking ball column 42 is slidably connected in the double-striking cylinder 41, and the material crushing pipe 32 is located on the moving path of the double-striking ball column 42. A double-striking spring 43 is provided in the double-striking cylinder 41. One end of the double-striking spring 43 is fixedly connected to the end point of the double-striking ball column 42 located in the double-striking cylinder 41, and the other end is fixedly connected to the inner bottom surface of the double-striking cylinder 41. One end of a bent square rod 44 is installed on the positioning cylinder 38, and the other end of the bent square rod 44 passes through the preheating tank 2 and is connected with the positioning ring 40. When the T-shaped rack 7 reciprocates, it will also drive the engaged driving gear 8 to rotate reciprocally. Under the action of the driving rotating shaft 33, the driving gear 8 drives the driving turntable 34 to rotate reciprocally, so that the driving cylinder 35 thereon can reciprocate in the rectangular sliding groove 37, and the driving torque block 36 thereon can reciprocally slide at the positioning base 39 through the positioning cylinder 38. Thus, under the action of the bent square rod 44, the positioning ring 40 can be driven to reciprocate in the preheating tank 2, so that the repeated hitting column 42 on the positioning ring 40 continuously contacts the crushing pipe 32, and the repeated hitting spring 43 is continuously in a buffering and reset state. The buffering force brought by it can prevent the force applied by the repeated hitting column 42 to the crushing pipe 32 from being too large and causing damage to it. At the same time, the vibration generated by continuously knocking on the pipe wall can reduce the contact points between powder particles, reduce the adhesion and cohesion between particles, and further reduce the internal friction force, making the powder easier to slide and flow relatively, and improving the overall fluidity of the powder. At the same time, when the powder flows in the pipe, it will accumulate at some parts in the crushing pipe 32 for various reasons, and even cause blockage in severe cases. Knocking on the pipe wall can make the powder subject to external forces, prevent local aggregation, keep the powder evenly distributed in the pipe, make the material fall smoothly, ensure the normal conveying function of the pipeline, improve production efficiency, and at the same time improve the forming effect of the device on the workpiece.

[0023] A material pushing and anti-sticking unit is further arranged on the second pulley 28 of this embodiment; the material pushing and anti-sticking unit includes a displacement lead screw 45 installed on the side of the second pulley 28 away from the preheating tank 2. One end of the displacement lead screw 45 away from the second pulley 28 is installed with a displacement base 46, and the displacement base 46 is fixedly installed at the preheating tank 2; a displacement square block 47 is threadedly connected to the displacement lead screw 45, and a displacement cylinder 48 is slidably connected to the displacement square block 47. The displacement cylinder 48 is fixedly installed on the displacement base 46; a linkage square rod 49 is connected to the displacement square block 47, the linkage square rod 49 is connected with a scraping block 50, and the scraping block 50 is located in the preheating tank 2 and contacts its bottom. When the second pulley 28 rotates reciprocally, it will also drive the displacement lead screw 45 to rotate reciprocally, so that the engaged displacement square block 47 can reciprocate at the displacement cylinder 48. Thus, under the action of the linkage square rod 49, the scraping block 50 can be driven to reciprocate in the preheating tank 2. Since the scraping block 50 contacts the bottom of the preheating tank 2, the scraping block 50 can continuously push the metal powder, prevent the metal powder from accumulating in the same position for a long time and causing caking, and can be continuously dispersed. At the same time, the bottom of the preheating tank 2 is continuously scraped, preventing the metal powder from adhering to the bottom of the preheating tank 2 during the heating process and affecting the powder quality, and improving the forming effect of the device on the workpiece.

[0024] The present invention also provides a method for additive manufacturing of a ceramic-metal composite grinding roller, including the following steps: S1. Feed the metal powder required for manufacturing the workpiece into the preheating tank 2 for heat treatment to reduce the friction and adhesion between particles and make the flow of the metal powder smooth; S2. Operate the swirling and throwing component to break up the agglomerates in the metal powder so that heat can be evenly transferred to each particle.

[0025] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to 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 ceramic-metal composite grinding roller additive manufacturing device, comprising a connecting frame (1); characterized in that: A preheating tank (2) is installed on the connecting frame (1), a T-shaped base (3) is connected to the side wall of the preheating tank (2), and a wind-making heat-drying device is arranged on the T-shaped base (3), and the wind-making heat-drying device is used to send the generated hot air into the preheating tank (2) to heat the metal powder inside the preheating tank (2); the wind-making heat-drying device comprises a brake L seat (4) installed at the bottom of the T-shaped base (3), and two symmetrical brake slide columns (5) are installed through the top of the brake L seat (4), and the brake slide columns (5) are slidably matched with the brake L seat (4); The tops of the two brake slides (5) are commonly connected to a brake cross block (6); T-shaped racks (7) are installed on both sides of the brake cross block (6); the opposite back surfaces of the two T-shaped racks (7) are respectively meshed and connected to a driving gear (8) and a rotating gear (9); a rotary throwing assembly is arranged on the rotating gear (9), and the rotary throwing assembly is used to break up agglomerates in the metal powder; and a re-impacting and dispersing mechanism is arranged on the driving gear (8), and the re-impacting and dispersing mechanism is used to improve the flow performance of the metal powder during loading and unloading.

2. The ceramic-metal composite grinding roller additive manufacturing device according to claim 1, characterized in that: A brake spring (10) is sleeved on the brake slide column (5), one end of the brake spring (10) is fixedly connected to the brake cross block (6), and the other end is fixedly connected to the brake L seat (4); one end of the two brake slide columns (5) away from the brake cross block (6) is commonly connected to a brake square plate (11); a retaining frame (12) is also installed on the brake L seat (4), and an air-making square box (13) is installed in the retaining frame (12); the retaining frame (12) is located in the air-making square box (13) and the two are slidably matched; a ventilation groove (14) is provided at the bottom of the air-making square box (13), and a ventilation valve is installed in the ventilation groove (14); a connecting groove (15) is provided on the outer wall of the preheating tank (2), and a connecting valve is installed in the connecting groove (15).

3. The ceramic-metal composite grinding roller additive manufacturing device according to claim 2, characterized in that: A gas outlet groove (16) is provided on a side of the gas-making square box (13) away from the preheating tank (2), and the gas outlet groove (16) is located between the ventilation groove (14) and the brake square plate (11); a gas outlet valve is also installed in the gas outlet groove (16); a gas transmission square pipe (17) is also installed on the gas-making square box (13), and one end of the gas transmission square pipe (17) is connected to the gas outlet groove (16); the other end of the gas transmission square pipe (17) is installed on the outer wall of the preheating tank (2) and is connected to the connecting groove (15); a plurality of heating modules (18) are installed on the inner wall of the gas transmission square pipe (17); a driving motor (19) is also installed on a side of the T-shaped base (3) away from the preheating tank (2), and a driving cam (20) is installed on the output end of the driving motor (19), and the top of the brake cross block (6) is located at the rotation path of the side wall of the driving cam (20).

4. The ceramic-metal composite grinding roller additive manufacturing device according to claim 1, characterized in that: The rotary throwing assembly comprises a rotating shaft (21) mounted on a rotating gear (9), the rotating shaft (21) being connected to a rotating seat (22), the rotating seat (22) being fixedly mounted on a retaining frame (12); a rotating bevel gear (23) being mounted on an end of the rotating shaft (21) away from the rotating gear (9), the rotating bevel gear (23) being meshingly connected to an auxiliary bevel gear (24), an auxiliary rotating shaft (25) being mounted on the auxiliary bevel gear (24), a first pulley (26) being mounted on an end of the auxiliary rotating shaft (25) away from the auxiliary bevel gear (24), and one end of a transmission belt (27) being connected to the first pulley (26).

5. The ceramic-metal composite grinding roller additive manufacturing device according to claim 4, characterized in that: The other end of the transmission belt (27) is connected to a second pulley (28), and the second pulley (28) and the first pulley (26) are slidably matched with the transmission belt (27); a stirring shaft (29) is installed on the side of the second pulley (28) close to the preheating tank (2), and the stirring shaft (29) and the auxiliary shaft (25) are commonly connected to an auxiliary base (30), and the auxiliary base (30) is fixedly installed on the preheating tank (2); a rotating blade (31) is installed at the end point of the stirring shaft (29) located in the preheating tank (2), and the center axis of the rotating blade (31) is arranged parallel to the bottom of the preheating tank (2), and the rotating blade (31) faces the inner wall of the preheating tank (2).

6. The ceramic-metal composite grinding roller additive manufacturing device according to claim 1, characterized in that: A feed inlet and a discharge outlet are respectively provided at the top and bottom of the outer wall of the preheating tank (2), and a spiral crushing tube (32) is installed at both the feed inlet and the discharge outlet. The crushing tube (32) is located inside the preheating tank (2); the inner wall of the crushing tube (32) is provided with a spiral groove.

7. The ceramic-metal composite grinding roller additive manufacturing device according to claim 6, characterized in that: The re-impact and drainage mechanism comprises a driving shaft (33) mounted on a driving gear (8), one end of the driving shaft (33) passes through a rotating seat (22) and is connected to a driving turntable (34), a driving column (35) is mounted on an edge of a side of the driving turntable (34) away from the driving shaft (33); a driving moment block (36) is also arranged on a side of the driving turntable (34), a rectangular slide groove (37) is arranged on a side of the driving moment block (36) close to the driving turntable (34), and the rectangular slide groove (37) is slidably matched with the driving column (35); two symmetrical positioning cylinders (38) are mounted on the top of the driving moment block (36), the two positioning cylinders (38) are slidably connected to a positioning base (39), and the positioning base (39) is mounted on the rotating seat (22).

8. The ceramic-metal composite grinding roller additive manufacturing device according to claim 7, characterized in that: A positioning ring (40) is provided in the preheating tank (2). A plurality of re-strike cylinders (41) are provided on one side of the positioning ring (40) close to the crushing tube (32). A re-strike ball column (42) is slidably connected in the re-strike cylinder (41). The crushing tube (32) is located at the moving path of the re-strike ball column (42). A re-strike spring (43) is provided in the re-strike cylinder (41). One end of the re-strike spring (43) is fixedly connected to the end point of the re-strike ball column (42) located in the re-strike cylinder (41), and the other end is fixedly connected to the inner bottom surface of the re-strike cylinder (41). One end of a bent square rod (44) is mounted on the positioning cylinder (38). The other end of the bent square rod (44) passes through the preheating tank (2) and is connected to the positioning ring (40).

9. The ceramic-metal composite grinding roller additive manufacturing device according to claim 5, characterized in that: The second pulley (28) is also provided with a material pushing and anti-sticking unit; the material pushing and anti-sticking unit comprises a displacement screw (45) mounted on a side of the second pulley (28) away from the preheating tank (2); a displacement base (46) is mounted on one end of the displacement screw (45) away from the second pulley (28); the displacement base (46) is fixedly mounted on the preheating tank (2); a displacement block (47) is threadedly connected to the displacement screw (45); a displacement cylinder (48) is slidably connected to the displacement block (47); the displacement cylinder (48) is fixedly mounted on the displacement base (46); a linkage square rod (49) is connected to the displacement block (47); the linkage square rod (49) is connected to a scraping block (50); the scraping block (50) is located in the preheating tank (2) and in contact with the bottom thereof.

10. A ceramic-metal composite grinding roller additive manufacturing method, using the ceramic-metal composite grinding roller additive manufacturing device as claimed in claim 1, characterized in that: Includes steps: S1, feeding the metal powder required for manufacturing the workpiece into a preheating tank (2) for heating treatment to reduce the friction and adhesion between the particles so that the metal powder can flow smoothly; S2. Operate the rotary throwing assembly to break up the agglomerates in the metal powder so that the heat can be evenly transferred to each particle.

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