Centrifugal forming device and metal powder forming system

Abstract

The invention discloses a centrifugal forming device and a metal powder forming system.The centrifugal forming device comprises a centrifugal rotating unit, the centrifugal rotating unit comprises a main shaft and a centrifugal rotating assembly arranged on the main shaft, the centrifugal rotating assembly comprises a rotating disc, and the main shaft is used for driving the rotating disc to rotate so that molten metal dripping on the rotating disc can be thrown out under the action of centrifugal force; the mounting unit comprises a base, an adjusting assembly and a mounting assembly, the mounting assembly is used for mounting a main shaft of the centrifugal rotating unit, and the adjusting assembly is arranged between the base and the mounting assembly and used for fixedly connecting the mounting assembly to the base and adjusting the levelness of a rotating disc arranged on the main shaft and the position of the central axis of the rotating disc. According to the method, the uniformity degree of the granularity of the prepared copper powder can be improved, it is guaranteed that the copper powder has the good sphericity degree, and the method plays an important role in achieving industrial and continuous machining of the copper powder.

Description

Technical Field

[0001] The invention belongs to the technical field of metal powder processing, and in particular relates to a centrifugal forming device and a metal powder forming system for preparing metal powder. Background Art

[0002] With the development of laser printing technology and electron beam 3D printing technology, the 3D printing of copper and its alloys is becoming more and more widely used in industry. Foreign companies such as NASA have entered the experimental stage of 3D printing of copper alloy thrust chamber components. Domestic companies have also carried out research on 3D printing technology of copper alloy tail nozzles. At the same time, the application of copper and its alloys in electric vehicle parts has promoted the rapid development of 3D printing technology of copper and its alloys.

[0003] Copper and copper alloy powders, as important raw materials for 3D printing, are showing a rapid growth trend. However, the traditional aerosol preparation process is difficult to prepare copper and copper alloy powders that meet SLM application indicators, and the product stability is poor, making the preparation of copper and copper alloy powders an important link restricting the industrial application of copper and copper alloy 3D printing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a centrifugal forming device and a metal powder forming system for preparing metal powder, so as to solve the problem that the existing aerosolized metal powder preparation device cannot meet the needs of industrial production and application of copper powder, and is particularly suitable for the industrial preparation and forming of metal powder for additive manufacturing.

[0005] The present invention is achieved through the following technical solutions: A centrifugal forming device, comprising: A centrifugal rotating unit comprises a main shaft and a centrifugal rotating assembly arranged on the main shaft, wherein the centrifugal rotating assembly comprises a rotating disk, and the main shaft is used to drive the rotating disk to rotate so that the molten metal dripping on the rotating disk is thrown outward under the action of centrifugal force; The mounting unit includes a base, an adjustment component and a mounting component. The mounting component is used to install the main shaft of the centrifugal rotating unit. The adjustment component is arranged between the base and the mounting component, and is used to fix the mounting component to the base and adjust the horizontality of the rotating disk arranged on the main shaft and the position of the central axis of the rotating disk.

[0006] In some embodiments, the adjustment component includes: Base; A slide plate adjustment assembly is arranged on the base, and the slide plate adjustment assembly includes a lower slide plate arranged on the base and an upper slide plate arranged on the lower slide plate; The lower slide plate is slidably connected to the base, so that the lower slide plate can slide on the base along the X-axis direction, and an X-direction positioning adjustment mechanism is provided between the lower slide plate and the base, for adjusting the position of the lower slide plate on the base along the X-direction and fixing the lower slide plate on the base; The upper slide plate is slidably connected with the lower slide plate so that the upper slide plate can slide on the lower slide plate along the Y-axis direction. A Y-direction positioning adjustment mechanism is provided between the upper slide plate and the lower slide plate for adjusting the position of the upper slide plate on the lower slide plate along the Y-direction and fixing the upper slide plate on the lower slide plate; And a level adjustment component arranged between the base and the pedestal, the level adjustment component includes at least three groups of adjustment screw assemblies, and the adjustment screw assembly includes an adjustment screw and an adjustment nut which fixes the adjustment screw to the base and the pedestal at both ends respectively.

[0007] In some embodiments, the lower slide plate is provided with X-direction strip holes along the X-axis direction on both sides thereof, and X-direction locking screws are provided in the X-direction strip holes, and the X-direction locking screws are threadedly connected to the base; The upper slide plate is provided with Y-direction strip holes along the Y-axis direction on both sides thereof, and the Y-direction strip holes are matched with Y-direction locking screws, and the Y-direction locking screws are threadedly connected to the lower slide plate.

[0008] In some embodiments, the centrifugal rotating assembly includes a rotating support, the rotating support includes a mounting portion and a rotating handle, the rotating handle is connected to the main shaft, and the mounting portion is provided with a mounting groove; The bottom of the rotating disk is provided with a mounting boss matched with the mounting groove, and the mounting boss is matched and arranged in the mounting groove; A mounting hole is provided on the rotating handle along its axial direction, a threaded hole connected to the mounting hole is provided on the mounting boss, a connecting screw is provided in the mounting hole, the connecting screw is connected to the rotating disk through the threaded hole, and the connecting screw applies a force along the central axis direction of the rotating disk to the rotating disk, thereby fixing the rotating disk on the rotating support.

[0009] In some embodiments, the rotating disk is made of SiC, and the rotating support is made of metal material.

[0010] In some embodiments, the mounting assembly includes: A hollow support cylinder, wherein the support cylinder is arranged on the adjustment assembly; The mounting seat is arranged on the supporting tube, the mounting seat includes a water cooling jacket arranged in an annular shape, the supporting tube is provided with a water cooling channel, the water cooling channel is connected with the water cooling jacket at the bottom of the water cooling jacket, so that the cooling medium can circulate in the water cooling jacket through the water cooling channel.

[0011] In some embodiments, the water cooling channel is an annular water cooling cavity formed along the circumferential direction of the support tube, and a plurality of communication channels are provided between the water cooling cavity and the water cooling jacket, so that the cooling medium can circulate between the water cooling cavity and the water cooling jacket, and the water cooling cavity is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both arranged toward the inside of the support tube; The base and the adjusting assembly are provided with pipeline channels for the water inlet pipeline and the water outlet pipeline to extend into the supporting cylinder, the water inlet pipeline is connected to the water inlet, and the water outlet pipeline is connected to the water outlet.

[0012] In some embodiments, the water cooling jacket is a frustum structure, the mounting seat includes a mounting plate arranged on the top of the water cooling jacket and a connecting plate arranged on the bottom of the water cooling jacket, and the main shaft is fixedly arranged on the mounting plate and extends into a cavity formed by the water cooling jacket and the support tube.

[0013] In some embodiments, a mounting hole is provided on the support cylinder, a clamp is fixedly provided on the main shaft, and the clamp is provided in a mounting seat and fixedly connected to the mounting seat through bolts.

[0014] In another aspect, the present invention further provides a metal powder forming system, comprising: Atomization chamber; And the centrifugal forming device, the base is connected to the atomizing chamber, so that the centrifugal forming device is suspended in the atomizing chamber.

[0015] In some embodiments, the base is connected to the atomization chamber via a mounting tube that is horizontally arranged to penetrate the atomization chamber. The mounting tube is fixedly connected to the atomization chamber at both ends. The base is provided with a pipeline channel through which a water inlet pipeline and a water outlet pipeline can pass and extend into the mounting tube.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: An adjusting component is arranged on the mounting unit. After the centrifugal forming device is assembled to the atomizing chamber, the horizontality and position of the rotating disk can be adjusted through the adjusting component, so that the copper liquid droplets dripping from the smelting device can just drip on the center of the rotating disk, and it is avoided that when the copper liquid drops on the high-speed rotating disk, the eccentric force in other directions on the rotating disk is generated, which affects the rotation stability of the rotating disk, ensures the consistency of the force applied to the copper liquid when it is thrown out, improves the uniformity of the particle size of the prepared copper powder, ensures that the copper powder has good sphericity, and can avoid damage to the rotating disk caused by the unstable rotation of the rotating disk, thereby improving the service life of the rotating disk, and playing an important role in realizing the industrialization and continuous processing of copper powder.

[0017] The centrifugal forming device solves the problem of matching when installing the centrifugal forming device in the atomizing chamber, reduces the requirements for the assembly accuracy between the two when the centrifugal forming device is assembled in the atomizing chamber, and easily ensures the centering accuracy of the rotating disk and the copper liquid droplet.

[0018] The rotating disk made of silicon carbide in the device is connected to the main shaft through a rotating support, which solves the problem that the connection strength cannot be guaranteed when the silicon carbide rotating disk is directly connected to the main shaft, and the rotating disk is easily damaged, which is difficult to meet the requirements of industrial production; an embedded connection method is adopted between the rotating disk and the rotating support, and the rotating support forms a covering on the rotating disk in the circumferential direction. Combined with the movement characteristics of the rotating disk, a stable connection between the rotating disk and the rotating support is achieved, and the rotating disk will not fall off the rotating support during high-speed rotation. The force applied by the rotating support to the rotating disk is small, and the applied force is distributed along the radial direction of the rotating disk, which further reduces the force that may be generated on the rotating disk, avoids possible damage to the rotating disk, and increases the service life of the rotating disk; at the same time, a tightening force is applied to the rotating disk by setting a connecting screw along the central axis direction of the rotating disk, which further ensures that the rotating disk rotating at high speed will not fall off the rotating support, and because the force applied to the rotating disk in its axial direction is small, this connection method can avoid damage to the connecting screw and the rotating disk at the connection position.

[0019] The arrangement of the water-cooling jacket and the water-cooling chamber on the device forms a circulating cooling environment around the spindle to cool down the high-speed running spindle. The arrangement of the hollow supporting cylinder provides installation space for the circulating water-cooling pipeline. The water-cooling pipeline is arranged in the supporting cylinder to reduce the impact of the high temperature environment in the atomization chamber on the pipeline and avoid affecting the recovery of copper powder when the pipeline is directly exposed in the atomization chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the structure of the centrifugal forming device in an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of a centrifugal rotating unit in a centrifugal forming device in an embodiment of the present invention being arranged on a mounting unit.

[0023] Figure 3 for Figure 2 Cross-sectional view of the centrifugal forming device.

[0024] Figure 4 Schematic diagram of the structure of the centrifugal rotating assembly of the centrifugal forming device in an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of the structure of a metal powder forming system in an embodiment of the present invention.

[0026] in: 10. Mounting unit, 11. Base, 12. Adjustment assembly, 121. Lower slide plate, 122. Upper slide plate, 123. X-axis strip hole, 124. Y-axis strip hole, 125. X-axis locking screw, 126. Y-axis locking screw, 127. Fixing piece, 128. Adjustment screw, 129. Adjustment screw, 1210. Adjustment nut, 13. Mounting seat, 131. Water cooling jacket, 132. Mounting plate, 133. Connecting plate, 14. Support cylinder, 141. Water cooling chamber, 142. Water inlet, 143. Water outlet, 15. Communication channel, 16. Pipe channel, 17. Mounting hole, 18. Base, 19. Mounting pipe; 20. Centrifugal rotating unit, 21. Main shaft, 211. Clamp, 22. Rotating support, 221. Rotating handle, 222. Mounting part, 23. Rotating disk, 231. Mounting boss, 24. Connecting screw; 30. Atomization chamber. DETAILED DESCRIPTION

[0027] In order to make the purpose, 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 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, not all of the embodiments.

[0028] When copper powder is processed and formed by centrifugal atomization, the copper liquid dripping on the rotating disk is decomposed into smaller droplets under the centrifugal force generated by the high-speed rotating disk and thrown into the atomization chamber. The high-speed droplets are solidified into spherical metal powders with tiny particle sizes under the action of their surface tension during the flight in the atomization chamber. Usually, the particle size of metal powders required by different 3D printing processes is also different, including 0-25μm, 15-53μm, and 20-45μm.

[0029] In this molding method, the position of the rotating disk has an important influence on the molding quality of the copper powder. When the rotation center of the rotating disk and the position where the copper liquid drops are not on the same axis, the copper liquid drops will drop at a position deviated from the rotation center of the rotating disk. At this time, the copper liquid dripping on the rotating disk will produce a large eccentric force on the rotating disk. This force will have a very large impact on the stability of the rotating disk, especially when the rotating disk rotates at high speed (the rotating disk speed can reach 100,000 rpm), and the stability of the rotating disk at high speed will have a direct impact on the molding quality of the copper powder. The position where the copper liquid drops deviate from the rotation center of the rotating disk will not only cause uneven force on the rotating disk, but also cause uneven heating at various positions of the rotating disk. Under long-term working conditions, it will cause the rotating disk to burst, affecting the service life of the rotating disk.

[0030] Similarly, the higher the levelness of the rotating disk, the easier it is to ensure the particle size and uniformity of the metal powder obtained by centrifugal forming; therefore, the levelness of the rotating disk and the centering accuracy of the rotating disk have an important influence on the forming quality of the metal powder forming system.

[0031] The requirement for the position accuracy of the rotating disk has caused great difficulties in the setting and assembly of the rotating disk in the atomization chamber. When the centrifugal forming device is installed in the atomization chamber, it is often difficult to ensure the centering accuracy between the rotating disk and the smelting device and the horizontality of the rotating disk.

[0032] In view of the above problems existing in industrial production, in some embodiments of the present invention, a centrifugal forming device for preparing metal powder is provided. Figure 1 , Figure 2 and Figure 3 ,include: The centrifugal rotating unit 20 includes a main shaft 21 and a centrifugal rotating assembly disposed on the main shaft, wherein the centrifugal rotating assembly includes a rotating disk 23, and the main shaft 21 is used to drive the rotating disk 23 to rotate, so that the molten metal dripping on the rotating disk is thrown outward under the action of centrifugal force; The mounting unit 10 includes a base 18, an adjustment component 12 and a mounting component. The mounting component is used to install the main shaft of the centrifugal rotating unit. The adjustment component is arranged between the base and the mounting component, and is used to fix the mounting component to the base and adjust the horizontality of the rotating disk set on the main shaft and the position of the central axis of the rotating disk.

[0033] In the centrifugal forming device of this embodiment, an adjustment component is provided on the mounting unit. After the centrifugal forming device is assembled to the atomizing chamber, the horizontality of the rotating disk is adjusted by the adjustment component to meet the preparation requirements. When the central axis of the rotating disk and the position where the copper liquid of the smelting device drops are not located on the same straight line, the position of the main shaft and the rotating disk installed on the mounting seat can be adjusted by the adjustment component, so that the copper liquid droplets dripping from the smelting device can just drip on the center of the rotating disk, and avoid the copper liquid dripping on the high-speed rotating disk, which generates eccentric forces in other directions on the rotating disk and affects the stability of the rotation of the rotating disk; at this time, the stability of the rotation of the rotating disk and the consistency of the landing point of the copper liquid on the rotating disk can well ensure the consistency of the force of the copper liquid when it is thrown out, thereby improving the uniformity of the particle size of the prepared copper powder and the sphericity of the copper powder; at the same time, the damage to the rotating disk caused by the unstable rotation of the rotating disk can be avoided, the service life of the rotating disk is improved, and the industrialization and continuous processing of the copper powder are realized. Play an important role.

[0034] The centrifugal forming device of the above-mentioned embodiment, during assembly, can adjust the horizontality and centering position of the rotating disk by adjusting the assembly after the centrifugal forming device is assembled into the atomization chamber, thereby reducing the requirements for assembly accuracy between the centrifugal forming device and the atomization chamber; by optimizing the assembly process, when the centrifugal forming device is assembled into the atomization chamber, there is no need to perform centering operation at the connection position between the atomization chamber and the centrifugal forming device, and the assembly and adjustment of the centrifugal forming device in the atomization chamber is more convenient.

[0035] In some embodiments, the adjustment component 12 includes: Base 11; A lower slide plate 121 disposed on the base 11 and an upper slide plate 122 disposed on the lower slide plate; The lower slide plate 121 is slidably connected to the base 11, so that the lower slide plate can slide on the base along the X-axis direction. An X-direction positioning adjustment mechanism is provided between the lower slide plate 121 and the base 11, which is used to adjust the position of the lower slide plate on the base along the X-direction and fix the lower slide plate on the base; The upper slide plate 122 is slidably connected with the lower slide plate 121, so that the upper slide plate can slide on the lower slide plate along the Y-axis direction. A Y-direction positioning adjustment mechanism is provided between the upper slide plate and the lower slide plate, which is used to adjust the position of the upper slide plate on the lower slide plate along the Y-direction and fix the upper slide plate on the lower slide plate; And a level adjustment assembly is arranged between the base 11 and the pedestal 18, the level adjustment assembly includes at least three sets of adjustment screw assemblies, the adjustment screw assembly includes an adjustment screw 129 and an adjustment nut 1210 that fixes the adjustment screw to the base 11 and the pedestal 18 at both ends respectively.

[0036] The adjustment component adopts a structure in which an upper slide plate, a lower slide plate, an X-direction positioning adjustment mechanism and a Y-direction positioning adjustment mechanism cooperate with each other. The structure is simple and can ensure the stability of the installation component setting on the device and the stability of the main shaft operation.

[0037] When the horizontality is adjusted by the horizontality adjustment assembly, the adjustment nuts on the adjustment screws are adjusted to adjust the horizontality of the base and the rotating disk arranged on the base. At the same time, the height position of the rotating disk in the atomization chamber can also be adjusted by multiple adjustment screw assemblies.

[0038] In some embodiments, the lower plate 121 is provided with X-direction strip holes 123 along the X-axis direction on both sides thereof, and an X-direction locking screw 125 is provided in the X-direction strip hole 123, and the X-direction locking screw 125 is threadedly connected to the base 11; The upper slide plate 122 is provided with Y-direction strip holes 124 along the Y-axis direction on both sides thereof, and a Y-direction locking screw 126 is provided in the Y-direction strip hole 124 . The Y-direction locking screw 126 is threadedly connected to the lower slide plate 121 .

[0039] This sliding fit structure has a simple structure and can easily ensure the adjustment and fit accuracy between the lower slide plate and the base, and between the upper slide plate and the lower slide plate. At the same time, after adjustment is in place, the lower slide plate and the upper slide plate can be fixed by X-axis locking screws and Y-axis locking screws to achieve stable installation of the installation components in the device.

[0040] Reference Figure 2 and Figure 3 The X-direction positioning adjustment mechanism can adopt fixing members 127 arranged oppositely on both sides of the base and adjusting screws 128 arranged on the fixing members, and the adjusting screws are threadedly connected to the fixing members. By adjusting the two adjusting screws arranged oppositely, the position of the lower slide plate along the X-axis direction can be adjusted, and the lower slide plate can be fixed on the base at the same time. The Y-direction positioning adjustment mechanism can adopt the same structure as the X-direction positioning adjustment mechanism to adjust the position of the upper slide plate on the lower slide plate along the Y-axis direction, and its structure is not described in detail here.

[0041] In some embodiments, reference Figure 4 The centrifugal rotating assembly includes a rotating support 22, the rotating support 22 includes a mounting portion 222 and a rotating handle 221, the rotating handle 221 is connected to the main shaft 21, and a mounting groove is provided on the mounting portion 222; The bottom of the rotating disk 23 is provided with a mounting boss 231 that matches the mounting groove, and the mounting boss 231 is matched and arranged in the mounting groove; A mounting hole is provided on the rotating handle 221 along its axial direction, and a threaded hole connected to the mounting hole is provided on the mounting boss 231. A connecting screw 24 is provided in the mounting hole. The connecting screw 24 is connected to the rotating disk through the threaded hole. The connecting screw 24 applies a force along the central axis direction of the rotating disk to the rotating disk, thereby fixing the rotating disk on the rotating support.

[0042] In combination with the performance requirements of the centrifugal rotating assembly, the rotating handle of the centrifugal rotating assembly and the main shaft needs to meet the requirements of small size and high strength, while the rotating disk is usually made of high-temperature resistant non-metallic materials such as SiC. Under high-speed rotation, the rotating handle is prone to breakage, thereby affecting the continuous and industrial processing of copper powder particles. In this embodiment, the centrifugal rotating assembly is designed as a split structure, and a rotating support is provided as a transition connection between the rotating disk and the main shaft to ensure the structural strength of the rotating handle. At the same time, in combination with the force and movement characteristics of the rotating disk, the rotating disk is wrapped and fixed in the radial direction and the circumferential direction, and the rotating disk is tightened and fixed in the axial direction, so that the rotating disk can be stably connected to the rotating support, and at the same time, the force of the rotating support and the connecting screws on the rotating disk can be reduced to avoid damage to the rotating disk.

[0043] A through hole structure is provided on the rotating handle 221, and a threaded hole with a left-handed thread is provided on the mounting boss of the rotating disk. The connecting screw adopts a left-handed thread, and the rotating disk is stably connected to the rotating support through the connecting screw.

[0044] In some embodiments, the rotating disk 23 is made of SiC, which is resistant to high temperatures, can reduce corrosion caused by copper liquid, and will not pollute the copper liquid, thereby ensuring the service life of the rotating disk. A continuous mounting boss structure is provided on the rotating disk, and the mounting boss and the rotating disk are in a continuous stepped structure, which facilitates the connection and assembly of the rotating disk and the rotating support, and facilitates the overall processing and molding of the rotating disk.

[0045] The rotating support 22 is made of metal material, such as TC4, etc., which has good structural strength. When the size of the rotating handle is small, its structural strength can be well guaranteed and the performance requirements of high-speed rotation of the centrifugal rotating component can be well met.

[0046] The surface of the rotating disk 23 is flat. The molten metal droplets drip onto the center of the rotating disk and are thrown out by the high-speed rotating disk. The molten metal droplets are broken into tiny droplets by the rotating disk during the throwing process.

[0047] With this split structure, the centrifugal rotating component can have a relatively small volume while having a relatively high structural strength, so as to meet the requirement of high-speed rotation of the centrifugal rotating component.

[0048] The centrifugal rotating assembly adopting the above structure can operate stably and reliably under high-speed working conditions, and its service life can reach more than 200 hours under continuous production, which greatly improves the industrial processing level of the centrifugal forming system.

[0049] In some embodiments, the mounting assembly includes: A hollow support cylinder 14, one end of which is disposed on the adjustment assembly 12; and a mounting seat 13, the mounting seat 13 being arranged at the other end of the supporting cylinder 14; The mounting seat 13 includes a water cooling jacket 131 arranged in an annular shape. A water cooling channel is arranged on the support tube. The water cooling channel is connected with the water cooling jacket at the bottom of the water cooling jacket so that the cooling medium can circulate in the water cooling jacket through the water cooling channel.

[0050] The high temperature environment in the atomization chamber will affect the stable operation of the spindle in a long-term working state. In this embodiment, a water cooling jacket is provided on the mounting seat to cool the working environment of the spindle, so as to improve the working environment of the spindle and ensure the continuous and stable operation of the spindle for a long time.

[0051] At the same time, in the structural design of the installation unit, a hollow support cylinder 14 is set to provide installation space for the main shaft, etc., and at the same time provide space for pipeline installation to ensure the cooling cycle of the water cooling jacket, so as to form a circulating cooling environment in the water cooling jacket.

[0052] In some embodiments, the water cooling channel is an annular water cooling cavity 141 formed along the circumferential direction of the support tube, and a plurality of connecting channels 15 are provided between the water cooling cavity 141 and the water cooling jacket 131, so that the cooling medium can circulate between the water cooling cavity and the water cooling jacket, and a water inlet 142 and a water outlet 143 are provided on the water cooling cavity 141, and both the water inlet 142 and the water outlet 143 are arranged toward the inside of the support tube 14; The base 11 and the adjusting assembly 12 are provided with a pipeline channel 16 for the water inlet pipeline and the water outlet pipeline to extend into the supporting cylinder. The water inlet pipeline is connected to the water inlet 142, and the water outlet pipeline is connected to the water outlet 143.

[0053] A water cooling cavity 141 is directly formed on the support tube 14 , and the water cooling cavity is used as a water cooling channel between the cooling medium and the water cooling jacket, and a water cooling environment can be formed inside the support tube, thereby providing a better cooling environment for the main shaft.

[0054] Reference Figure 3The water cooling chamber 141 is divided into a water inlet chamber and a water outlet chamber. The water inlet chamber and the water outlet chamber are connected to the water cooling jacket through different connecting channels 15. The water inlet pipe is connected to the water inlet chamber, and the water outlet pipe is connected to the water storage chamber. The cooling medium enters the water inlet chamber through the water inlet pipe, and enters the water cooling jacket through the water inlet chamber; the cooling medium in the water cooling jacket flows out through the water outlet chamber and the water outlet pipe in turn, so that the cooling medium circulates in the water cooling jacket and the water cooling chamber.

[0055] The design of arranging the water inlet and outlet pipes inside the support tube can reduce the impact of the high temperature environment in the atomization chamber on the pipes, ensure the cooling effect, and avoid affecting the recovery of copper powder when the pipes are directly exposed in the atomization chamber.

[0056] In some embodiments, the water cooling jacket 131 is an annular frustum structure, the mounting seat 13 includes a mounting plate 132 arranged on the top of the water cooling jacket and a connecting plate 133 arranged on the bottom of the water cooling jacket, and the main shaft 21 is fixedly arranged on the mounting plate and extends into the cavity formed by the water cooling jacket and the support tube.

[0057] The water-cooling jacket 131 provides a circulating cooling environment for the spindle and serves as a mounting platform for the spindle, so that the spindle is located in a closed cavity formed by the water-cooling jacket and the supporting tube, thereby achieving stable installation of the spindle and effectively isolating the spindle from the external high-temperature environment, thereby ensuring stable operation of the spindle under long-term working conditions and facilitating the installation of the water-cooling jacket.

[0058] In some embodiments, a mounting hole 17 is provided on the support cylinder 14 , and a clamp 211 is fixedly provided on the main shaft 21 . The clamp 211 is provided in the cavity of the water cooling jacket and is fixedly connected to the mounting seat through bolts.

[0059] In the installation of the main shaft, a clamp is arranged on the main shaft, and connected with the mounting plate of the mounting seat through the clamp, so that the main shaft is fixedly mounted on the mounting seat, and the clamp is arranged in the cavity of the water cooling jacket, so as to reduce the surface area of ​​the main shaft exposed in the atomizing chamber. At this time, in order to facilitate the fixed installation of the main shaft on the mounting seat, a mounting hole that can be connected to the inside of the supporting cylinder is arranged on the supporting cylinder, and a blind plate can be arranged on the mounting hole to close the orifice of the mounting hole, so as to isolate the inside of the supporting cylinder from the high temperature environment in the atomizing chamber.

[0060] On the other hand, the present invention also provides a metal powder forming system. In some embodiments, referring to Figure 5 , the centrifugal forming system includes: Atomizing chamber 30, a closed space is formed in the atomizing chamber 30, which provides the space and environment required for centrifugal atomization of copper powder; during the production process, the atomizing chamber is first vacuumed and then replaced with an inert gas, so that a slight positive pressure is present in the atomizing chamber, which can prevent the prepared metal powder (such as copper powder) from being oxidized and ensure that the metal droplets can be fully cooled during the molding process.

[0061] And the centrifugal forming device in the above embodiment, the base is connected to the atomization chamber, so that the centrifugal forming device is suspended in the atomization chamber.

[0062] During assembly and debugging, the Z-direction height and levelness of the rotating disk are adjusted through the levelness adjustment assembly, and then the centering position of the rotating disk is adjusted through the slide adjustment assembly.

[0063] The molten copper melted by the smelting device drips onto a high-speed rotating disc. The copper liquid droplets are decomposed into tiny droplets and thrown out. The droplets condense and form in the process to obtain spherical copper powder.

[0064] The centrifugal forming system is not only applicable to the processing and forming of copper powder, but also can be used for the forming of other metal powders.

[0065] In some embodiments, the base 18 is connected to the atomization chamber through a mounting tube 19 that is horizontally arranged to penetrate the atomization chamber. The mounting tube is fixedly connected to the atomization chamber at both ends. The base is provided with a pipeline channel through which the water inlet and outlet pipelines can pass and extend into the mounting tube.

[0066] Through the coordination of the mounting tube, the base and the supporting cylinder structure on the mounting assembly, the pipelines and the cables for powering the main shaft rotation drive can be hidden in the mounting tube and the supporting cylinder, avoiding direct exposure of the pipelines and cables to the high-temperature environment of the atomization chamber. The pipelines and cables are effectively protected and will not affect the forming and discharging of the metal powder in the atomization chamber, thus effectively solving the actual problems existing in the industrial production of metal powder.

[0067] Based on the centrifugal forming device and metal powder forming system in the above embodiment of the present invention, the copper powder prepared is of high quality, good sphericity, oxygen content is less than 200ppm, and the bulk density is greater than 4.9g / cm 3 , fluidity is less than 60s / 50g, and the satellite hollow powder rate is less than 5‰; the system has a high degree of industrialization in preparing copper powder, with a production capacity of 100 tons / year, and a recovery rate of 15-53μm powder products of more than 90%. The copper powder prepared by the preparation can well meet the performance requirements of additive manufacturing.

[0068] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship commonly placed when the product of the invention is used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0069] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0070] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. Centrifugal forming device, characterized in that: include: A centrifugal rotating unit comprises a main shaft and a centrifugal rotating assembly arranged on the main shaft, wherein the centrifugal rotating assembly comprises a rotating disk, and the main shaft is used to drive the rotating disk to rotate so that the molten metal dripping on the rotating disk is thrown outward under the action of centrifugal force; The mounting unit includes a base, an adjustment component and a mounting component. The mounting component is used to install the main shaft of the centrifugal rotating unit. The adjustment component is arranged between the base and the mounting component, and is used to fix the mounting component to the base and adjust the horizontality of the rotating disk arranged on the main shaft and the position of the central axis of the rotating disk.

2. The centrifugal forming device according to claim 1, characterized in that: The adjustment component comprises: Base; A slide plate adjustment assembly is arranged on the base, and the slide plate adjustment assembly includes a lower slide plate arranged on the base and an upper slide plate arranged on the lower slide plate; The lower slide plate is slidably connected to the base, so that the lower slide plate can slide on the base along the X-axis direction, and an X-direction positioning adjustment mechanism is provided between the lower slide plate and the base, for adjusting the position of the lower slide plate on the base along the X-direction and fixing the lower slide plate on the base; The upper slide plate is slidably connected with the lower slide plate so that the upper slide plate can slide on the lower slide plate along the Y-axis direction. A Y-direction positioning adjustment mechanism is provided between the upper slide plate and the lower slide plate for adjusting the position of the upper slide plate on the lower slide plate along the Y-direction and fixing the upper slide plate on the lower slide plate; And a level adjustment component arranged between the base and the pedestal, the level adjustment component includes at least three groups of adjustment screw assemblies, and the adjustment screw assembly includes an adjustment screw and an adjustment nut which fixes the adjustment screw to the base and the pedestal at both ends respectively.

3. The centrifugal forming device according to claim 2, characterized in that: The lower slide plate is provided with X-direction strip holes along the X-axis direction on both sides thereof, and X-direction locking screws are provided in the X-direction strip holes, and the X-direction locking screws are threadedly connected to the base; The upper slide plate is provided with Y-direction strip holes along the Y-axis direction on both sides thereof, and the Y-direction strip holes are matched with Y-direction locking screws, and the Y-direction locking screws are threadedly connected to the lower slide plate.

4. The centrifugal forming device according to claim 1, characterized in that: The centrifugal rotating assembly comprises a rotating support, the rotating support comprises a mounting portion and a rotating handle, the rotating handle is connected to the main shaft, and the mounting portion is provided with a mounting groove; The bottom of the rotating disk is provided with a mounting boss matched with the mounting groove, and the mounting boss is matched and arranged in the mounting groove; A mounting hole is provided on the rotating handle along its axial direction, a threaded hole connected to the mounting hole is provided on the mounting boss, a connecting screw is provided in the mounting hole, the connecting screw is connected to the rotating disk through the threaded hole, and the connecting screw applies a force along the central axis direction of the rotating disk to the rotating disk, thereby fixing the rotating disk on the rotating support.

5. The centrifugal forming device according to claim 4, characterized in that: The rotating disk is made of SiC, and the rotating support is made of metal material.

6. The centrifugal forming device according to claim 1, characterized in that: The installation assembly includes: A hollow support cylinder, wherein the support cylinder is arranged on the adjustment assembly; The mounting seat is arranged on the supporting tube, the mounting seat includes a water cooling jacket arranged in an annular shape, the supporting tube is provided with a water cooling channel, the water cooling channel is connected with the water cooling jacket at the bottom of the water cooling jacket, so that the cooling medium can circulate in the water cooling jacket through the water cooling channel.

7. The centrifugal forming device according to claim 6, characterized in that: The water cooling channel is an annular water cooling cavity formed along the circumferential direction of the support tube. A plurality of communication channels are provided between the water cooling cavity and the water cooling jacket, so that the cooling medium can circulate between the water cooling cavity and the water cooling jacket. The water cooling cavity is provided with a water inlet and a water outlet, and the water inlet and the water outlet are both arranged toward the inside of the support tube. The base and the adjusting assembly are provided with pipeline channels for the water inlet pipeline and the water outlet pipeline to extend into the supporting cylinder, the water inlet pipeline is connected to the water inlet, and the water outlet pipeline is connected to the water outlet.

8. The centrifugal forming device according to claim 6, characterized in that: The support cylinder is provided with a mounting hole, the main shaft is fixedly provided with a clamp, the clamp is arranged in a mounting seat and fixedly connected to the mounting seat through bolts.

9. A metal powder forming system, characterized in that: include: Atomization chamber; And the centrifugal forming device according to any one of claims 1 to 8, wherein the base is connected to the atomization chamber so that the centrifugal forming device is suspended in the atomization chamber.

10. The metal powder forming system according to claim 9, characterized in that: The base is connected to the atomizing chamber via a mounting tube that is horizontally arranged to penetrate the atomizing chamber. The mounting tube is fixedly connected to the atomizing chamber at both ends. The base is provided with a pipeline channel that can allow a water inlet pipeline and a water outlet pipeline to pass through and extend into the mounting tube.

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