Grinding device for metal powder processing

Abstract

This invention discloses a grinding device for metal powder processing, relating to the field of metal additive manufacturing powder technology. It includes a collection box with a controller fixedly installed on one side of its outer wall. A grinding cylinder is fixedly connected through the top of the collection box. The inner wall of the grinding cylinder is made of silicon carbide ceramic, and a grinding mechanism is installed inside the grinding cylinder. A spiral feeding mechanism, a gear transmission mechanism, and a cooling mechanism are sequentially arranged outside the grinding cylinder. This invention uses multiple surface-mount temperature sensors to monitor the temperature of different areas of the grinding cylinder in real time. When the temperature rises, a circulating pump starts, and cooling water circulates within a hollow cooling ring, carrying away the grinding heat. Furthermore, a water temperature control component actively cools and stirs the cooling water to ensure a continuously low temperature. This closed-loop temperature control system effectively controls the temperature of the grinding zone, effectively preventing oxidation, phase transformation, or cold welding of the metal powder, thus ensuring the production and forming effect of the metal additive powder.

Description

Technical Field

[0001] This invention relates to the field of powder production technology for metal additive manufacturing, and more particularly to a grinding apparatus for metal powder processing. Background Technology

[0002] In the production of metal additive manufacturing powders, metal raw materials need to be fed into a grinding device for grinding, turning large volumes of metal raw materials into fine metal powders for use in additive manufacturing (3D printing). However, existing metal powder grinding devices have the following technical drawbacks in use: Firstly, during the grinding process, mechanical energy is converted into heat energy, which causes the powder temperature to rise. This may lead to phase transformation, accelerated oxidation, or particle welding of the metal powder, thereby affecting the production and forming effect of the metal additive powder.

[0003] Secondly, uneven feeding and wide particle size distribution: Traditional grinding devices mostly use manual feeding or simple vibration feeding, which results in unstable feeding speed, causing material to accumulate or idle in the grinding cylinder, resulting in uneven grinding. The finished product contains both coarse and fine particles, with a wide particle size distribution, which makes it difficult to meet the strict requirements of additive manufacturing for powder particle size concentration.

[0004] Third, the grinding pressure is uncontrollable and the yield is low: the grinding structure with a fixed gap cannot automatically adjust the grinding pressure according to the changes in the particle size of the material. Large particles may get stuck, and small particles cannot be fully ground, requiring repeated grinding cycles, which is inefficient. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a grinding device for metal powder processing, which effectively solves the problems of powder oxidation, uneven feeding, and uneven particle size distribution caused by grinding heat in existing grinding devices.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A grinding device for metal powder processing includes a collection box with a controller fixedly installed on one side of the outer wall, a grinding cylinder fixedly connected through the top of the collection box, the inner wall of the grinding cylinder being made of silicon carbide ceramic, and a grinding mechanism being provided inside the grinding cylinder, and a spiral feeding mechanism, a gear transmission mechanism and a cooling mechanism being arranged sequentially outside the grinding cylinder. The grinding mechanism includes a rotating shaft concentrically mounted inside the grinding cylinder and a conical grinding head fixedly connected to the rotating shaft, and the bottom of the grinding cylinder is provided with uniformly distributed sieve holes. The spiral feeding mechanism includes a feeding cylinder fixedly connected to the grinding cylinder via a support base, a support frame fixedly connected to the side wall of the feeding cylinder, a drive motor fixedly installed on the side wall of the support frame, a transmission shaft rotatably installed inside the feeding cylinder, and spiral feeding blades welded to the outer wall of the transmission shaft. The cooling mechanism includes a cooling water storage tank fixedly installed on the outer wall of the other side of the collection tank, a circulation pump fixedly connected to the lower outer wall of the cooling water storage tank via a pump base, multiple hollow cooling rings fixedly mounted on the outer wall of the grinding cylinder, a multi-point sensing sensor group on the surface of the grinding cylinder, and a water temperature control component on the cooling water storage tank.

[0007] Preferably, the collection box is equipped with a pull-out powder collection drawer, and an adsorption iron sheet is fixedly embedded in the rear outer wall of the powder collection drawer. Four electromagnets are fixedly embedded in the rear of the collection box, and all four electromagnets are in contact with the surface of the adsorption iron sheet.

[0008] By adopting the above technical solution, the powder collection drawer is used to receive metal powder falling from the sieve holes. After the electromagnet is energized, it attracts the adsorption iron sheet, which firmly locks the drawer in the collection box to prevent the drawer from sliding out and causing powder spillage due to vibration or accidental contact. After the power is cut off, the magnetic force disappears and the drawer can be easily pulled out, which is convenient for powder collection and transfer, while avoiding the wear problem of traditional mechanical buckles.

[0009] Preferably, the bottom end of the rotating shaft extends outside the grinding cylinder and is fixedly connected to a brush rod, and the surface of the brush rod is provided with a bristle structure that contacts the sieve hole area.

[0010] By adopting the above technical solution, when the rotating shaft rotates, it drives the brush rod and brush bristle structure to rotate synchronously. The brush bristles continuously sweep across the sieve hole area at the bottom of the grinding cylinder, brushing off the powder particles blocked in the sieve holes, preventing sieve hole blockage, ensuring that the ground powder can be discharged in time, and avoiding over-grinding.

[0011] Preferably, the top front end of the feeding cylinder is fixedly connected to a feeding hopper, and the bottom rear end of the feeding cylinder is fixedly connected to the top of the grinding cylinder through a square tube feeding pipe.

[0012] By adopting the above technical solution, the feeding hopper facilitates batch feeding, and the spiral feeding blades quantitatively transport the metal raw materials from the front end of the feeding cylinder to the rear end, and then drop them into the grinding cylinder through the square tube discharge pipe, realizing continuous, uniform and controllable feeding, and avoiding grinding load fluctuations caused by uneven feeding.

[0013] Preferably, the output shaft of the drive motor passes through the support frame and is coaxially and fixedly connected to one end of the transmission shaft via a coupling, and the drive motor is a variable frequency motor.

[0014] By adopting the above technical solution, the variable frequency motor can adjust its speed through the controller, thereby changing the feeding speed of the spiral feeder blades and the rotation speed of the conical grinding head to meet different application requirements.

[0015] Preferably, the gear transmission mechanism includes a protective cover fixedly installed on the outer wall of the top of the grinding cylinder, a bevel gear A fixedly installed on the other end of the transmission shaft, and a bevel gear B fixedly fitted on the top of the rotating shaft. The other end of the transmission shaft passes through the feed cylinder and the protective cover in sequence, and the bevel gear A and the bevel gear B mesh with each other and are both located inside the protective cover.

[0016] By adopting the above technical solution, the transmission shaft can simultaneously drive the screw feeder and the grinding shaft, saving one motor and reducing costs and energy consumption; the protective cover encloses the gear pair to prevent dust from entering and ensure safety.

[0017] Preferably, the multi-point sensing sensor group includes multiple patch-type temperature sensors that are fixedly installed vertically on the outer surface of the grinding cylinder and are distributed at equal intervals.

[0018] By adopting the above technical solution, multiple temperature sensors are equidistantly distributed along the axial direction of the grinding cylinder, which can monitor the temperature changes at different heights of the grinding cylinder (corresponding to different positions in the grinding area) in real time and feed the signals back to the controller, thus providing a wider temperature monitoring range for the grinding area.

[0019] Preferably, the input end of the circulating pump is fixedly connected to the lower side of the cooling water storage tank through a pipe, the output end of the circulating pump is connected to the uppermost hollow cooling ring through a delivery pipe, a connecting pipe is fixedly connected between two adjacent hollow cooling rings, the connecting pipes are alternately distributed along the axis of the hollow cooling rings, and the lowermost hollow cooling ring is fixedly connected to the top of the cooling water storage tank through a return pipe.

[0020] By adopting the above technical solution, the cooling water enters from the uppermost hollow cooling ring, flows through each hollow cooling ring in sequence, and then returns to the water tank, forming a series circulation loop; the alternating distribution of connecting pipes causes the cooling water to flow in a spiral shape around the outer periphery of the grinding cylinder, which increases the heat exchange contact time between the cooling water and the cylinder wall, enhances the cooling effect, and thus effectively suppresses the accumulation of grinding heat.

[0021] Preferably, the water temperature control assembly includes a water temperature sensor fixedly installed in the cooling water storage tank, a heat insulation shaft rotatably installed on the inner wall of the top center of the cooling water storage tank, a rotary driver, a cooling rod coaxially fixedly installed on the outer wall of the bottom end of the heat insulation shaft, and a spiral stirring blade welded to the outer wall of the cooling rod.

[0022] By adopting the above technical solution, the water temperature sensor monitors the water temperature in the water tank in real time. When the water temperature exceeds the set value, the controller starts the cooling rod to actively cool the cooling water. At the same time, the rotary driver drives the cooling rod and the spiral stirring blade to rotate, so that the cooling water is forced to convect, improving the heat exchange efficiency. This ensures that the cooling water is always kept at a low temperature and continuously removes the grinding heat.

[0023] Preferably, the rotary drive includes a stirring motor fixedly connected to the rear outer wall of the cooling water storage tank via a motor mounting plate, a driving pulley fixedly mounted on the output shaft of the stirring motor, and a driven pulley fixedly mounted on the heat insulation shaft, wherein the driving pulley and the driven pulley are connected by the same transmission belt.

[0024] By adopting the above technical solution, the driving pulley is rotated by the stirring motor, and the driven pulley will drive the insulation shaft to rotate under the transmission effect of the transmission belt. In turn, the spiral stirring blades on the cooling rod will rotate, thereby achieving the effect of electric stirring.

[0025] The beneficial effects of this invention are as follows: 1. This invention features active cooling and temperature control to prevent powder oxidation and welding: Multiple surface-mount temperature sensors monitor the temperature of each area of ​​the grinding cylinder in real time. When the temperature rises, the circulation pump starts, and cooling water circulates in the hollow cooling ring to remove the grinding heat. The water temperature control component actively cools and stirs the cooling water to ensure that the cooling water remains at a low temperature. In this way, the closed-loop temperature control system can effectively control the temperature of the grinding zone, effectively preventing metal powder oxidation, phase change, or cold welding, and ensuring the production and forming effect of metal additive powder.

[0026] 2. The conical grinding head of this invention achieves progressive grinding with uniform particle size: A ring-shaped grinding gap with a wider upper part and a narrower lower part is formed between the conical grinding head and the inner wall of the grinding cylinder. The metal raw material falls under the action of gravity, and large particles are initially broken in the wider upper gap. As the gap gradually narrows, the particles are subjected to increasingly stronger shearing and compressive forces, and are further finely ground and shaped, and finally discharged from the bottom sieve hole. This makes the finished product after grinding concentrated in particle size and with a narrower particle size distribution.

[0027] 3. The spiral feeding of this invention is uniform and controllable, avoiding accumulation and idling: The spiral feeding mechanism quantitatively and continuously conveys the metal raw materials to the top of the grinding cylinder. The feeding speed and grinding speed can be steplessly adjusted according to the material characteristics and output requirements, avoiding the instability of traditional vibration feeding, ensuring the uniformity of the material layer in the grinding chamber, and improving the grinding efficiency.

[0028] 4. The anti-clogging design of the screen holes in this invention ensures continuous material discharge: The brush rod and brush bristle structure at the bottom of the rotating shaft rotate synchronously with the grinding head, continuously cleaning the screen hole area, brushing off the blocked powder, ensuring that the qualified powder is discharged in time, avoiding over-grinding, and preventing the screen holes from becoming blocked, which could lead to equipment failure.

[0029] 5. The magnetic powder collection drawer of this invention is safe and convenient: The powder collection drawer is fixed by electromagnet adsorption, and it is firmly locked when powered on to prevent vibration from causing it to fall out. When the power is off, the magnetic force disappears, and the drawer can be easily pulled out for convenient powder collection and transfer. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 This is a three-dimensional structural diagram of the entire invention from the front view; Figure 2 This is a three-dimensional structural diagram of the entire invention from the rear view; Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 This is a three-dimensional enlarged structural diagram of the interior of the grinding cylinder of the present invention; Figure 5 This is a three-dimensional structural diagram of the bottom of the grinding cylinder of the present invention; Figure 6 This is a three-dimensional enlarged structural schematic diagram of the screw feeding mechanism of the present invention; Figure 7 This is a three-dimensional enlarged structural schematic diagram of the cooling mechanism of the present invention; Figure 8 This is a side view of the connection between the hollow cooling ring and each connecting pipe in this invention. Figure 9 This is a three-dimensional enlarged structural diagram of the interior of the cooling water storage tank of the present invention.

[0032] In the diagram: 1. Collection box; 2. Grinding cylinder; 3. Rotating shaft; 4. Conical grinding head; 5. Sieve hole; 6. Powder collection drawer; 7. Brush rod; 8. Feeding cylinder; 9. Support frame; 10. Drive motor; 11. Transmission shaft; 12. Spiral feed blade; 13. Feed hopper; 14. Support base; 15. Protective cover; 16. Bevel gear A; 17. Bevel gear B; 18. Cooling water storage tank; 19. Circulating pump; 20. Hollow cooling ring; 21. Connecting pipe; 22. Conveying pipe; 23. Return pipe; 24. Water temperature sensor; 25. Insulating shaft; 26. Cooling rod; 27. Spiral stirring blade; 28. Stirring motor; 29. ​​Drive pulley; 30. Driven pulley; 31. Controller; 32. Surface mount temperature sensor; 33. Electromagnet. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example 1, referring to Figure 1-6 A grinding device for metal powder processing includes a collection box 1 with a controller 31 fixedly installed on one side of its outer wall. A grinding cylinder 2 is fixedly connected through the top of the collection box 1. The inner wall of the grinding cylinder 2 is made of silicon carbide ceramic. Silicon carbide ceramic has extremely high hardness and wear resistance, with a surface roughness Ra≤0.6μm. Silicon carbide ceramic itself is chemically inert and will not react with metal powder. It also has extremely low wear, ensuring the high purity of the powder. At the same time, silicon carbide ceramic has good thermal conductivity, which facilitates the rapid removal of high grinding temperatures. A grinding mechanism is provided inside the grinding cylinder 2, and a spiral feeding mechanism, a gear transmission mechanism, and a cooling mechanism are sequentially provided outside the grinding cylinder 2.

[0035] Specifically, the grinding mechanism includes a rotating shaft 3 concentrically mounted inside the grinding cylinder 2 and a conical grinding head 4 fixedly connected to the rotating shaft 3; further, the bottom of the grinding cylinder 2 is provided with uniformly distributed sieve holes 5, the bottom end of the rotating shaft 3 extends to the outside of the grinding cylinder 2 and is fixedly connected to a brush rod 7, and the surface of the brush rod 7 is provided with a bristle structure that contacts the area of ​​the sieve holes 5.

[0036] Specifically, the spiral feeding mechanism includes a feeding cylinder 8 fixedly connected to the grinding cylinder 2 via a support base 14, a support frame 9 fixedly connected to the side wall of the feeding cylinder 8, a drive motor 10 fixedly installed on the side wall of the support frame 9, a transmission shaft 11 rotatably installed inside the feeding cylinder 8, and spiral feeding blades 12 welded to the outer wall of the transmission shaft 11; furthermore, a feeding hopper 13 is fixedly connected to the front end of the top of the feeding cylinder 8, and the rear end of the bottom of the feeding cylinder 8 is fixedly connected to the top of the grinding cylinder 2 via a square tube feeding pipe. The output shaft of the drive motor 10 passes through the support frame 9 and is coaxially fixedly connected to one end of the transmission shaft 11 via a coupling. The drive motor 10 is a variable frequency motor.

[0037] Specifically, a pull-out powder collection drawer 6 is installed inside the collection box 1. An adsorption iron sheet is fixedly embedded on the rear outer wall of the powder collection drawer 6. Four electromagnets 33 are fixedly embedded on the rear of the collection box 1, and all four electromagnets 33 are in contact with the surface of the adsorption iron sheet. In this way, the qualified metal powder falls from the sieve hole 5 into the powder collection drawer 6 inside the collection box 1. The controller 31 energizes the electromagnets 33, and the electromagnets 33 generate magnetic force to attract the adsorption iron sheet on the back of the powder collection drawer 6, firmly fixing it in the collection box 1 to prevent the drawer from sliding out due to equipment vibration. When it is necessary to remove the powder, the operator cuts off the power to the electromagnets 33 through the controller 31. The magnetic force disappears, and the powder collection drawer 6 can be easily pulled out to transfer the powder to the storage container.

[0038] Specifically, the gear transmission mechanism includes a protective cover 15 fixedly installed on the outer wall of the top of the grinding cylinder 2, a bevel gear A16 fixedly installed on the other end of the transmission shaft 11, and a bevel gear B17 fixedly mounted on the top of the rotating shaft 3. The other end of the transmission shaft 11 passes through the feed cylinder 8 and the protective cover 15 in sequence. The bevel gear A16 and the bevel gear B17 mesh with each other and are both located inside the protective cover 15.

[0039] Example 2, refer to Figure 1-3 and Figure 7-9 This embodiment is an optimization based on embodiment 1. Specifically, the cooling mechanism includes a cooling water storage tank 18 fixedly installed on the outer wall of the other side of the collection tank 1, a circulation pump 19 fixedly connected to the lower outer wall of the cooling water storage tank 18 via a pump base, multiple hollow cooling rings 20 sequentially fixedly mounted on the outer wall of the grinding cylinder 2, a multi-point sensing sensor group disposed on the surface of the grinding cylinder 2, and a water temperature control component disposed on the cooling water storage tank 18. The cooling water storage tank 18 is made of stainless steel and its outer wall is covered with polyurethane insulation cotton. The four hollow cooling rings 20 are all made of aluminum alloy with good thermal conductivity.

[0040] Furthermore, the multi-point sensing sensor group includes multiple patch temperature sensors 32 that are fixedly mounted vertically on the outer surface of the grinding cylinder 2 and distributed at equal intervals. The patch temperature sensors 32 are model PT100 (accuracy ±0.1℃).

[0041] Furthermore, the input end of the circulating pump 19 is fixedly connected to the lower side of the cooling water storage tank 18 through a pipe, and the output end of the circulating pump 19 is connected to the uppermost hollow cooling ring 20 through a delivery pipe 22. A connecting pipe 21 is fixedly connected between two adjacent hollow cooling rings 20. Each connecting pipe 21 is alternately distributed along the axis of the hollow cooling ring 20. The lowermost hollow cooling ring 20 is fixedly connected to the top of the cooling water storage tank 18 through a return pipe 23.

[0042] Furthermore, the water temperature control assembly includes a water temperature sensor 24 fixedly installed inside the cooling water storage tank 18, a heat-insulating shaft 25 rotatably installed on the inner wall of the top center of the cooling water storage tank 18, a rotary actuator, a cooling rod 26 coaxially fixedly installed on the outer wall of the bottom end of the heat-insulating shaft 25, and a spiral stirring blade 27 welded to the outer wall of the cooling rod 26; wherein, the water temperature sensor 24 is a PT100 model, the heat-insulating shaft 25 is a stainless steel hollow shaft filled with polyurethane foam; the cooling rod 26 is a semiconductor cooling chip integrated rod and the spiral stirring blade 27 is a stainless steel spiral blade, and an electric slip ring can be installed at the top of the heat-insulating shaft 25 when it is energized.

[0043] Furthermore, the rotary drive includes a stirring motor 28 fixedly connected to the rear outer wall of the cooling water storage tank 18 via a motor mounting plate, a driving pulley 29 fixedly mounted on the output shaft of the stirring motor 28, and a driven pulley 30 fixedly mounted on the heat insulation shaft 25. The driving pulley 29 and the driven pulley 30 are connected by the same transmission belt.

[0044] The working method of this invention is as follows: First, the metal raw material is poured from the feeding hopper 13 into the feeding cylinder 8. The drive motor 10 drives the transmission shaft 11 to rotate, and the spiral feeding blades 12 welded to the transmission shaft 11 rotate accordingly. The spiral surface of the spiral blades pushes the raw material to move axially along the feeding cylinder 8 and falls from the square tube at the rear end of the bottom of the feeding cylinder 8 into the top of the grinding cylinder 2. The feeding speed and grinding speed can be adjusted by adjusting the speed of the drive motor 10.

[0045] Secondly, the other end of the drive shaft 11 transmits power to the rotating shaft 3 through bevel gear A16 and bevel gear B17. The rotating shaft 3 drives the conical grinding head 4 to rotate concentrically inside the grinding cylinder 2. The conical grinding head 4 is a cone that is larger at the top and smaller at the bottom, forming an annular gap that is wider at the top and narrower at the bottom with the inner wall of the cylindrical grinding cylinder 2. After the metal raw material enters the gap from the top, it moves downward under the action of gravity. The upper gap is larger, and the large particles of raw material are initially broken into smaller particles by the impact and crushing of the grinding head. As it moves downward, the gap gradually narrows, and the particles are subjected to increasing extrusion and shearing forces, and are further ground and refined. The powder ground to the target particle size is discharged through the sieve hole 5 at the bottom of the grinding cylinder 2 and falls into the powder collection drawer 6 in the collection box 1. Particles that do not pass through the sieve hole 5 continue to be ground in the grinding zone until they reach the particle size requirement. In addition, when the rotating shaft 3 rotates, the brush rod 7 and the brush bristle structure rotate synchronously with the rotating shaft 3. The brush bristle structure continuously sweeps across the sieve hole 5 area at the bottom of the grinding cylinder 2, brushing off the powder particles stuck in the sieve hole 5, ensuring that the sieve hole 5 is unobstructed.

[0046] Finally, multiple surface-mount temperature sensors 32 are vertically distributed along the outer wall of the grinding cylinder 2 to monitor the temperature of each grinding zone in real time and transmit the data to the controller 31. When the temperature detected by any sensor exceeds the set threshold, the controller 31 starts the circulation pump 19 and the water temperature control component. The circulation pump 19 draws out the low-temperature cooling water from the cooling water storage tank 18 and sends it through the delivery pipe 22 into the uppermost hollow cooling ring 20. The cooling water flows sequentially through each hollow cooling ring 20 (adjacent rings are connected by connecting pipes 21, which are alternately distributed to make the water flow in a spiral path), absorbing the heat transferred from the wall of the grinding cylinder 2. The heated cooling water returns to the cooling water storage tank 18 from the lowermost hollow cooling ring 20 through the return pipe 23. At the same time, the water temperature sensor 24 detects the water temperature in the cooling water storage tank 18. If the water temperature exceeds the set value, the controller 31 starts the stirring motor 28 and the cooling rod 26. The stirring motor 28 drives the insulating shaft 25 to rotate via a transmission belt. The cooling rod 26 and the spiral stirring blade 27 rotate together. The cooling rod 26 actively cools the water, while the spiral stirring blade 27 forces the cooling water to convect, accelerating heat exchange and causing the water temperature to drop rapidly. This cycle continues, keeping the temperature of the grinding cylinder 2 within the set range.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding apparatus for metal powder processing, comprising a collection box (1) with a controller (31) fixedly mounted on one side of its outer wall, characterized in that, The top of the collection box (1) is fixedly connected to a grinding cylinder (2). The inner wall of the grinding cylinder (2) is made of silicon carbide ceramic, and a grinding mechanism is provided inside the grinding cylinder (2). A spiral feeding mechanism, a gear transmission mechanism and a cooling mechanism are arranged in sequence outside the grinding cylinder (2). The grinding mechanism includes a rotating shaft (3) that is concentrically mounted inside the grinding cylinder (2) and a conical grinding head (4) that is fixedly connected to the rotating shaft (3). The bottom of the grinding cylinder (2) is provided with uniformly distributed sieve holes (5). The spiral feeding mechanism includes a feeding cylinder (8) fixedly connected to the grinding cylinder (2) via a support base (14), a support frame (9) fixedly connected to the side wall of the feeding cylinder (8), a drive motor (10) fixedly installed on the side wall of the support frame (9), a transmission shaft (11) rotatably installed inside the feeding cylinder (8), and spiral feeding blades (12) welded to the outer wall of the transmission shaft (11). The cooling mechanism includes a cooling water storage tank (18) fixedly installed on the outer wall of the other side of the collection tank (1), a circulation pump (19) fixedly connected to the lower outer wall of the cooling water storage tank (18) via a pump seat, a plurality of hollow cooling rings (20) fixedly mounted on the outer wall of the grinding cylinder (2), a multi-point sensing sensor group set on the surface of the grinding cylinder (2), and a water temperature control component set on the cooling water storage tank (18).

2. The grinding apparatus for metal powder processing according to claim 1, characterized in that, The collection box (1) is equipped with a pull-out powder collection drawer (6), and an adsorption iron sheet is fixedly embedded on the rear outer wall of the powder collection drawer (6). Four electromagnets (33) are fixedly embedded on the rear of the collection box (1), and all four electromagnets (33) are in contact with the surface of the adsorption iron sheet.

3. The grinding apparatus for metal powder processing according to claim 1, characterized in that, The bottom end of the rotating shaft (3) extends to the outside of the grinding cylinder (2) and is fixedly connected to a brush rod (7), and the surface of the brush rod (7) is provided with a bristle structure that contacts the area of ​​the sieve hole (5).

4. The grinding apparatus for metal powder processing according to claim 1, characterized in that, The top front end of the feeding cylinder (8) is fixedly connected to the feeding hopper (13), and the bottom rear end of the feeding cylinder (8) is fixedly connected to the top of the grinding cylinder (2) through the square tube feeding pipe.

5. A grinding apparatus for metal powder processing according to claim 1, characterized in that, The output shaft of the drive motor (10) passes through the support frame (9) and is coaxially fixedly connected to one end of the transmission shaft (11) through a coupling. The drive motor (10) is a variable frequency motor.

6. A grinding apparatus for metal powder processing according to claim 1, characterized in that, The gear transmission mechanism includes a protective cover (15) fixedly installed on the outer wall of the top of the grinding cylinder (2), a bevel gear A (16) fixedly installed on the other end of the transmission shaft (11), and a bevel gear B (17) fixedly mounted on the top of the rotating shaft (3). The other end of the transmission shaft (11) passes through the feed cylinder (8) and the protective cover (15) in sequence, and the bevel gear A (16) and the bevel gear B (17) mesh with each other and are both located inside the protective cover (15).

7. A grinding apparatus for metal powder processing according to claim 1, characterized in that, The multi-point sensing sensor group includes multiple patch temperature sensors (32) that are fixedly installed vertically on the outer surface of the grinding cylinder (2) and distributed at equal distances.

8. A grinding apparatus for metal powder processing according to claim 1, characterized in that, The input end of the circulating pump (19) is fixedly connected to the lower side of the cooling water storage tank (18) through a pipe. The output end of the circulating pump (19) is connected to the uppermost hollow cooling ring (20) through a delivery pipe (22). A connecting pipe (21) is fixedly connected between two adjacent hollow cooling rings (20). Each connecting pipe (21) is alternately distributed along the axis of the hollow cooling ring (20). The lowermost hollow cooling ring (20) is fixedly connected to the top of the cooling water storage tank (18) through a return pipe (23).

9. A grinding apparatus for metal powder processing according to claim 1, characterized in that, The water temperature control assembly includes a water temperature sensor (24) fixedly installed in the cooling water storage tank (18), a heat insulation shaft (25) rotatably installed on the inner wall of the top center of the cooling water storage tank (18), a rotary driver, a cooling rod (26) coaxially fixedly installed on the outer wall of the bottom end of the heat insulation shaft (25), and a spiral stirring blade (27) welded to the outer wall of the cooling rod (26).

10. A grinding apparatus for metal powder processing according to claim 9, characterized in that, The rotary drive includes a stirring motor (28) fixedly connected to the rear outer wall of the cooling water storage tank (18) via a motor mounting plate, a driving pulley (29) fixedly mounted on the output shaft of the stirring motor (28), and a driven pulley (30) fixedly mounted on the heat insulation shaft (25), and the driving pulley (29) and the driven pulley (30) are connected by the same transmission belt.

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