A device for preparing spherical metal powder for 3D printing

Abstract

The invention provides a device for preparing spherical metal powder for 3D printing, and relates to the technical field of 3D printing material preparation. The device for preparing spherical metal powder for 3D printing comprises a frame, wherein a front support, a middle support and a rear tail support are arranged on the frame; the front support is mounted on the frame, a material ejecting component is mounted on the front support, and a clamping block is arranged on the material ejecting component; a loading rack is mounted on the middle support, a plurality of material accommodating channels are opened on the loading rack, a clamping component is arranged in the material accommodating channels, and a clamping groove is arranged on the clamping component; a rotating cylinder is connected to the middle support; an unlocking mechanism is arranged on the material ejecting component or the clamping component; the unlocking mechanism can realize rapid engagement when the material ejecting component is engaged with the clamping component, and can realize rapid disengagement when the metal bar is replaced, which not only makes the operation more convenient and simple, but also can effectively save the time consumed in replacing the metal bar, and is very beneficial to improving the overall work efficiency and processing speed.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing material preparation, and in particular to a device for preparing spherical metal powder for 3D printing. Background Art

[0002] The invention patent with the patent number CN201510010946.0 discloses a method for preparing metal powder for 3D printing by plasma-assisted rotating electrodes. The specific content of the method is: using a low-voltage strong current to generate a plasma arc in the narrow space between a plasma-assisted electrode and a rotating cylindrical consumable electrode made of high-temperature metal. The high temperature generated by the plasma arc causes a section of the high-temperature metal electrode close to the plasma arc to enter a molten state, forming small droplets of high-temperature metal. The centrifugal force generated by the high-speed rotation of the rotating high-temperature metal electrode is used to throw out the small droplets of high-temperature metal. The small droplets of high-temperature metal are air-cooled and solidified into spheres in a closed environment protected by an inert atmosphere, and are collected at the bottom of the container to obtain high-temperature 3D printing metal balls. The diameter of the obtained 3D printing metal balls is 20-60um.

[0003] The equipment used in the above method must be shut down for a long time to replace new materials after each cylindrical consumable electrode is used up or reaches a predetermined remaining length and needs to be replaced before it can continue to work, which seriously affects the preparation rate and work efficiency of printing materials. Summary of the invention

[0004] The purpose of the present invention is to provide a device for preparing spherical metal powder for 3D printing, aiming to solve the problem that the replacement of metal bars 4 in existing equipment affects the preparation speed of 3D printing powder.

[0005] To achieve the above object, the present invention adopts the following technical solution: comprising a frame, on which a front support, a middle support and a rear tail support are arranged;

[0006] Front support: Slidingly mounted on the frame, the front support is equipped with a material lifting component that can extend toward the middle support, and a retractable clamping block is provided on the material lifting component;

[0007] Middle support: A loading rack is rotatably mounted on one end close to the front support, and a plurality of material storage channels for filling metal bars are provided on the loading rack. A clamping component for clamping the metal bars is provided in each material storage channel, and an annular clamping groove is provided on the inner wall of the clamping component; when the ejecting component is inserted into the clamping component, the clamping block can be engaged with the clamping groove; a rotating cylinder is rotatably connected to the middle support, and when the ejecting component is extended toward the middle support, the clamping component and the metal bars can be pushed into the rotating cylinder;

[0008] Unlocking mechanism: It is set on the ejecting component or the clamping component and is used to control the card block to achieve rapid disassembly and assembly of the ejecting component and the clamping component.

[0009] In order to facilitate the release of the clamping relationship between the ejecting component and the clamping component, the unlocking mechanism includes:

[0010] Sliding frame: Slidingly installed in front of the top material component, the sliding frame has multiple support rods, and the multiple support rods correspond to the card blocks one by one;

[0011] Handle: hinged at one end of the sliding frame;

[0012] Slot: Opened in the top material component, used to install the sliding frame and handle;

[0013] Pulling structure: installed between the end of the support rod and the block; when the support rod moves in a direction away from the support seat, the pulling structure can shrink toward the axial direction of the lifting component;

[0014] Connecting piece: arranged between the pulling structure and the clamping block; when the pulling structure contracts toward the axial direction of the ejecting component, the connecting piece can contract toward the pulling clamping block to release the clamping connection between the ejecting component and the clamping component.

[0015] Specifically, the pulling structure includes a mounting groove opened at the end of the support rod, a radial slideway facing the axis of the lifting component is opened on the side wall of the mounting groove, an inner sliding block is slidably connected in the mounting groove, one end of the inner sliding block inserted into the mounting groove is provided with a protrusion inserted into the radial slideway, a first elastic member is provided between the inner sliding block and the bottom of the mounting groove, an outer sliding block is slidably connected to the inner sliding block, an axial slideway is opened on the outer sliding block, and a first inclined surface is provided on one end of the outer sliding block close to the support rod.

[0016] In the first embodiment of the present invention, the connecting member is a second elastic member, and a second inclined surface is provided at one end of the clamping block close to the clamping member.

[0017] The second embodiment of the present invention: the connecting member is a connecting rod.

[0018] In order to make the second embodiment of the present invention have better performance, when the inner sliding block moves to one end of the axial slide close to the clamping component, there is an overlapping area between the outer sliding block and the support rod, which is used to self-lock the contraction of the card block; when the inner sliding block moves to one end of the axial slide close to the handle, the overlapping area between the outer sliding block and the support rod is released, thereby releasing the self-locking of the contraction of the card block.

[0019] The third embodiment of the present invention: the clamping block is installed on the top material component via the third elastic member, and a plurality of unlocking grooves are provided on the clamping component, the unlocking grooves are connected with the clamping grooves, a fixed shaft parallel to the axis of the clamping component is provided in the unlocking groove, a pressure plate is hinged on the fixed shaft, an unlocking ring is rotatably connected to the outer side of the clamping component, a plurality of unlocking hooks corresponding to the pressure plates are provided on the inner wall of the unlocking ring, and the unlocking hook has a third inclined surface for squeezing one end of the pressure plate.

[0020] In order to realize the function of preparing spherical metal powder for 3D printing, a powder processing shell is provided at one end of the middle support close to the rear tailstock, the rotating cylinder is connected to the powder processing shell, and an electrode inlet is provided at one end of the powder processing shell close to the rear tailstock;

[0021] Rear tailstock: Slidingly mounted on the frame and can move toward the middle support;

[0022] Electrode holder: installed on the rear tailstock, with a tungsten electrode head on the electrode holder. When the rear tailstock moves to the position of the powder processing shell, the tungsten electrode head can be inserted into the powder processing shell through the electrode inlet; when the metal bar approaches the tungsten electrode head to a suitable distance, a plasma arc is generated between the two.

[0023] In order to realize the synchronous rotation of the metal bar and the rotating cylinder, a linkage mechanism is provided between any one of the clamping components and the inner wall of the rotating cylinder to realize the synchronous rotation of the metal bar and the rotating cylinder.

[0024] Specifically, the linkage mechanism includes a plurality of guide strips arranged on the outer side wall of the clamping component, and guide grooves corresponding to the guide strips are provided on the inner wall of the material containing channel and the rotating cylinder.

[0025] The beneficial effects of the present invention are:

[0026] 1. The push-up component, driven by the second driving device, can push the metal bar from the material storage channel into the rotating cylinder, and cooperate with the guide groove on the inner wall of the rotating cylinder under the action of the guide strip on the outer side of the clamping component, so that the metal bar and the rotating cylinder rotate synchronously, providing centrifugal force conditions for the molten material, so as to realize the preparation process of spherical metal powder, and when the remaining amount of metal bar is insufficient, the second driving device can also pull the clamping component out from the material storage channel through the push-up component, so as to quickly replace the new metal bar, save the time wasted in replacing the metal bar during the processing operation, improve the preparation rate, and increase the production output;

[0027] 2. The loading rack is provided with a plurality of material storage channels, each of which is provided with a clamping component. When working, it can not only clamp the metal bar material to increase the stability of the metal bar material during the rotation process in the rotating cylinder, but also directly rotate the loading rack when replacing the new metal bar material to switch the material storage channel, so as to realize the function and role of quickly replacing the metal bar material, and further improve the convenience and efficiency of replacing the metal bar material;

[0028] 3. At the same time, the ejecting component is also provided with an unlocking mechanism for quickly releasing the card block and the card slot, which can realize quick connection when the ejecting component is engaged with the clamping component, and can realize quick separation when the metal bar is replaced, which not only makes the operation more convenient and simple, but also can effectively save the time spent on replacing the metal bar, which is very beneficial to improving the overall work efficiency and processing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic front view of the front support in the initial state of the present invention;

[0030] FIG2 is a front view schematic diagram of the present invention when the front support and the clamping member are in a docking state;

[0031] FIG3 is a schematic diagram of the disassembly of the present invention in a left-side view;

[0032] FIG4 is a disassembly schematic diagram of the present invention in a right-side view;

[0033] FIG. 5 is a schematic diagram of a cutaway front view of the middle support of the present invention

[0034] FIG6 is an enlarged schematic diagram of the end of the ejection component in the present invention;

[0035] FIG7 is a schematic diagram of the present invention in which the outer sliding block and the ejecting member eliminate the overlapping area;

[0036] FIG8 is an isometric diagram of the sliding frame in the first embodiment of the present invention;

[0037] FIG9 is an enlarged view of the mounting groove on the sliding frame in the first embodiment of the present invention;

[0038] 10 is an isometric schematic diagram of the inner sliding block and the outer sliding block according to the first embodiment of the present invention;

[0039] FIG11 is an isometric diagram of a sliding frame according to a second embodiment of the present invention;

[0040] 12 is an isometric schematic diagram of the clamping member of the third embodiment of the present invention;

[0041] 13 is an axonometric diagram of the unlocking ring in the disassembled state according to the third embodiment of the present invention;

[0042] FIG14 is a schematic front view of an unlocking ring according to a third embodiment of the present invention;

[0043] FIG. 15 is a schematic diagram of the installation of the lower clamping block according to the third embodiment of the present invention.

[0044] In the figure: 1, front support; 11, seat body; 111, through hole; 112, second slide; 12, vertical plate; 13, support plate; 14, inside the first slide; 15, first drive device; 151, first motor; 152, first lead screw; 16, second drive device; 161, second motor; 162, second lead screw; 2, top material component; 21, block; 211, second inclined surface; 22, slot; 3, middle support; 31, loading rack; 311, material storage channel; 32, clamping component; 321, clamping mechanism; 322, slot; 33, rotating cylinder; 331, linkage mechanism; 3311, guide strip; 3312, guide slot; 332, third drive device; 3321, third motor; 3322, tooth groove; 33 23. Gear assembly; 34. Powder processing shell; 341. Electrode inlet; 4. Metal bar; 5. Unlocking mechanism; 51. Sliding skeleton; 52. Support rod; 53. Handle; 54. Pulling structure; 541. Mounting groove; 542. Radial slideway; 543. Inner slide block; 544. Protrusion; 545. First elastic member; 546. Outer slide block; 547. Axial slideway; 548. First inclined plane; 55. Connecting member; 551. Second elastic member; 552. Connecting rod; 561. Third elastic member; 562. Unlocking groove; 563. Fixed shaft; 564. Press plate; 565. Unlocking ring; 566. Unlocking hook; 567. Third inclined plane; 6. Rear tailstock; 61. Third slide; 62. Electrode holder; 63. Tungsten electrode head; DETAILED DESCRIPTION

[0045] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0046] As shown in FIG. 1-4 , a device for preparing spherical metal powder for 3D printing includes a frame, and the frame is provided with a front support 1, a middle support 3 and a rear tail support 6 from left to right in sequence; wherein:

[0047] The front support 1 is slidably connected to the frame so as to be able to approach the middle support 3. The front support 1 is provided with a material ejecting component 2, which can move relative to the front support 1 toward the middle support 3. The material ejecting component 2 is used to eject the metal bar 4 installed on the middle support 3 toward the rear tailstock 6.

[0048] The rear tailstock 6 is slidably connected to the frame so that it can approach the middle support 3. The rear tailstock 6 is provided with an electrode holder 62, and a tungsten electrode head 63 is installed on the electrode holder 62. When the metal bar 4 approaches the tungsten electrode head 63, a plasma arc is generated between the two, so that the metal bar 4 enters a molten state;

[0049] A loading rack 31 is rotatably mounted on one end of the middle support 3 close to the front support 1 via a mounting shaft, and a plurality of material containing channels 311 are provided on the loading rack 31, and the plurality of material containing channels 311 are evenly distributed in a circle with the mounting shaft as the center, and the material containing channels 311 are used to fill the metal bars 4; a rotating cylinder 33 is rotatably connected to the middle support 3, and the rotating cylinder 33 passes through the middle support 3, and the rotating cylinder 33 can be aligned with the material containing channels 311, so that the metal bars 4 can be pushed by the top material component 2. Push the metal bars 4 in the material containing channels 311 into the rotating cylinder 33, and make it rotate with the rotating cylinder 33; a powder processing shell 34 is provided on one end of the middle support 3 close to the rear tailstock 6, and the end of the powder processing shell 34 close to the middle support 3 is connected to the rotating cylinder 33, and the metal bars 4 can extend into the powder processing shell 34 to realize the powder processing operation, and the powder processing shell 34 An electrode inlet 341 is provided at one end close to the rear tailstock 6 for inserting the tungsten electrode head 63 on the rear tailstock 6 into the powder processing housing 34 to generate a plasma arc and prepare spherical metal powder for 3D printing.

[0050] During the specific operation, firstly, the metal bar material 4 is loaded into the plurality of material receiving channels 311, and then the loading rack 31 is rotated to align the material receiving channels 311 with the rotating cylinder 33. When the loading rack 31 is rotated to align the material receiving channels 311 with the rotating cylinder 33, a sense of frustration is generated to remind the operator that the velvet material channel has been aligned with the rotating cylinder 33.

[0051] Then, the rear tailstock 6 is moved to be close to the middle support 3, and the tungsten electrode head 63 on the rear tailstock 6 is inserted into the powder processing shell 34, and the electrode holder 62 is fixedly connected to the powder processing shell 34 using the bolts on the electrode holder 62, so as to increase the stability of the tungsten electrode head 63 in the powder processing shell 34, and prevent the tungsten electrode head 63 from moving due to not being fixed, resulting in a change in the distance between the tungsten electrode head 63 and the metal bar 4, which causes the plasma arc to be unstable, thereby further improving the preparation quality of the spherical metal powder for 3D printing;

[0052] Finally, the front support 1 slides toward the middle support 3, and the ejecting component 2 on the front support 1 is coaxial with the rotating cylinder 33. When the front support 1 moves toward the middle support 3 to the limit position, the ejecting component 2 is just inserted into the material containing channel 311. When the ejecting component 2 moves on the front support 1 toward the middle support 3, the metal bar 4 can be pushed into the rotating cylinder 33, so that the metal bar 4 can rotate driven by the rotating cylinder 33, and the metal bar 4 can be brought close to the tungsten electrode head 63 to generate a plasma arc, so that the metal bar 4 is in a molten state, and then the metal bar 4 in a molten state is thrown out by relying on the centrifugal force generated by the rotation of the metal bar 4 to generate spherical metal powder for 3D printing.

[0053] Please refer to Figures 1-4. The frame is provided with a first slide 14 for guiding the front support 1. The front support 1 is slidably installed on the first slide 14. The front support 1 is provided with a first driving device 15. The first driving device 15 is used to drive the front support 1 to approach the middle support 3. The front support 1 is provided with a second slide 112. The second slide 112 is provided with a second driving device 16. The second driving device 16 is used to drive the top material component 2 to move toward the middle support 3. The frame is provided with a third slide 61 for installing the rear tailstock 6 and guiding the sliding of the rear tailstock toward the middle support 3.

[0054] It should be noted that the middle support 3 is fixed to the frame, and the front support 1 and the rear tail support 6 can be moved in a variety of ways including but not limited to manual, electric or hydraulic drive;

[0055] Specifically, the rear tailstock 6 is moved manually, and a limit plate is hinged on the frame to limit the rear tailstock 6 when the electrode holder 62 is connected to the powder processing housing 34. The operation method is that before the rear tailstock 6 approaches the powder processing housing 34, the limit plate is rotated outward and expanded to prevent the limit from blocking the movement of the rear tailstock 6. After the rear tailstock 6 moves into place, the limit plate is rotated inward to block the rear of the protruding part of the rear tailstock 6 to prevent the rear tailstock 6 from moving backward.

[0056] The front support 1 includes a seat body 11 and a vertical plate 12, the seat body 11 and the vertical plate 12 are integrally arranged and move synchronously, the second slide 112 is arranged on the seat body 11, wherein a through hole 111 is opened on the seat body 11, and a support plate 13 is slidably connected in the through hole 111, and the first driving device 15 includes a first motor 151 installed on the support plate 13, and a first lead screw 152 is installed on the output shaft of the first motor 151, and the first lead screw 152 is threadedly connected to the vertical plate 12, and one end of the first lead screw 152 close to the middle support 3 is connected to the loading rack 31 with a single degree of freedom, and the loading rack 31 will not rotate with the first lead screw 152 when the first lead screw 152 rotates, and the loading rack 31 only supports the first lead screw 152; when the first transmission device is working, the first motor 151 works on the support plate 13 to drive the first lead screw 152 to rotate, and when the first lead screw 152 and the vertical plate 12 are connected, the first lead screw 152 is connected to the vertical plate 12. Under the action of the threaded connection, the front support 1 is driven to move closer to or away from the middle support 3, so as to achieve the docking of the material ejecting component 2 and the material containing channel 311. At the same time, the support plate 13 slides with the first motor 151 in the through hole 111 to avoid interference between the seat body 11 and the first motor 151, thereby affecting the movement of the front support 1.

[0057] The second driving device 16 includes a second motor 161 installed on the second slide 112, a second lead screw 162 is installed on the output shaft of the second motor 161, the ejecting component 2 is installed at one end of the second lead screw 162 close to the middle support 3, and the second lead screw 162 is threadedly connected to the vertical plate 12; when the second driving device 16 is working, the second motor 161 works on the second slide 112, drives the second lead screw 162 to rotate on the vertical plate 12, thereby driving the second motor 161 to approach or move away from the vertical plate 12 along the second slide 112, and at the same time makes the ejecting component 2 move toward the material receiving channel 311, and with the driving of the second motor 161, the ejecting component 2 can transfer the metal bar material 4 from the material receiving channel 311 to the rotating cylinder 33;

[0058] It should be specially noted that the second drive device 16 has two modes: fast feed and working feed. When the sheet metal bar 4 is pushed from the material receiving channel 311 to the rotating cylinder 33, the fast feed mode can be used to save time; when the metal bar 4 is about to approach the tungsten electrode head 63, the working feed mode can be used to push the metal bar 4 to the tungsten electrode head 63 at a suitable speed.

[0059] Please refer to FIGS. 3-6 . In order to increase the stability of the metal bar 4 in the rotating cylinder 33 , a clamping component 32 is slidably connected in each material receiving channel 311 . The clamping component 32 is provided with a clamping mechanism 321 for clamping the metal bar 4 .

[0060] Please refer to FIG. 3 , the clamping mechanism 321 includes but is not limited to a three-claw chuck mechanism, which can not only clamp the cylindrical metal bar 4 but also penetrate the metal bar 4 to generate a plasma arc with the tungsten electrode head 63 to prepare spherical metal powder for 3D printing.

[0061] Please refer to FIG. 3 and FIG. 4 . In order to realize that the rotating cylinder 33 drives the metal bar 4 to rotate, a linkage mechanism 331 is provided between the clamping component 32 and the inner wall of the rotating cylinder 33, or between the metal bar 4 and the inner wall of the rotating cylinder 33. Specifically, the linkage mechanism 331 includes but is not limited to a plurality of guide bars 3311 provided on the outer wall of the clamping component 32, guide grooves 3312 corresponding to the guide bars 3311 are provided on the material receiving channel 311 and the inner wall of the rotating cylinder 33, and the metal bar 4 and the rotating cylinder 33 can also realize synchronous rotation by friction.

[0062] When working, when the pushing component 2 pushes the metal bar 4 together with the clamping component 32 into the rotating cylinder 33, the rotating cylinder 33 can drive the metal bar 4 to rotate under the action of the guide bar 3311 and the guide groove 3312 to meet the preparation requirements of spherical metal powder for 3D printing.

[0063] Furthermore, a third driving device 332 is provided on the middle support 3 for providing power for the rotation of the rotating cylinder 33;

[0064] Specifically, the third driving device 332 includes a third motor 3321 mounted on the middle support 3, and an annular tooth groove 3322 is provided on the outer wall of the rotating barrel. The third motor 3321 is meshed with the tooth groove 3322 through a gear assembly 3323 to realize the function of the third motor 3321 driving the rotating barrel 33 to rotate;

[0065] It should be noted that the third motor 3321 stops the rotating cylinder 33 at a certain angle through the gear assembly 3323, so that the guide groove 3312 in the rotating cylinder 33 is aligned with the guide groove 3312 in the material receiving channel 311, so that the metal bar 4 can be pushed into the rotating cylinder 33 under the push of the ejecting component 2.

[0066] Please refer to Figures 5 and 6. In order to facilitate the removal of the remaining metal bar 4 and the clamping component 32 from the rotating cylinder 33 and the material containing channel 311 by relying on the ejecting component 2, an annular groove 322 is provided on the inner wall of the clamping component 32 at one end close to the ejecting component 2, and a plurality of clamping blocks 21 that can be engaged with the groove 322 are provided at the end of the ejecting component 2. The clamping block 21 can be popped out from the ejecting component 2 and inserted into the groove 322 to achieve the engagement between the ejecting component 2 and the clamping component 32. Therefore, when the remaining length of the metal bar 4 is insufficient, under the action of the docking assembly and the groove 322, the clamping component 32 can be pulled out from the rotating cylinder 33, so as to facilitate the replacement of a new material containing channel 311 and the ejecting component 2 for docking, thereby achieving the effect of quickly replacing a new metal bar 4, improving work efficiency and the preparation speed of spherical metal powder for 3D printing, and achieving higher output operations.

[0067] Please refer to Figure 6-14. The ejecting component 2 or the clamping component 32 is provided with an unlocking mechanism 5 for releasing the clamping relationship between the ejecting component 2 and the clamping component 32, which is used to quickly release the cooperation between the clamping block 21 and the clamping groove 322, so as to achieve rapid separation of the ejecting component 2 and the clamping component 32, so as to facilitate the ejecting component 2 to be clamped with the clamping component 32 installed with a new metal bar 4, so as to achieve uninterrupted operation, so as to further improve the operation speed and efficiency.

[0068] Please refer to Figures 6-10, the first embodiment of the unlocking mechanism 5: it includes a sliding skeleton 51 slidably installed on the front part of the lifting component 2, the sliding skeleton 51 has a plurality of support rods 52 parallel to the axis of the lifting component 2, and the plurality of support rods 52 correspond to the block 21 one by one. The end of the support rod 52 is provided with a pulling structure 54 for pulling the block 21 toward the axial direction of the lifting component 2. The end of the sliding skeleton 51 away from the block 21 is hinged with a handle 53, which is used to realize the reciprocating movement of the sliding skeleton 51 along the axial direction of the lifting component 2 when the handle 53 is pulled. When the sliding skeleton 51 moves in the direction away from the end in the lifting component 2, the block 21 can be pulled inwardly, so that the block 21 shrinks into the lifting component 2, thereby realizing the separation of the block 21 from the card slot 322, so as to facilitate the lifting component 2 and the clamping component 32 to release the clamping relationship, thereby rotating the loading frame 31, and quickly realizing the lifting component 2 It is connected with the new clamping part 32 and quickly enters the working state;

[0069] It should be noted that a slot 22 is provided in the ejecting component 2 for installing the sliding frame 51 and the clamping block 21, so that the sliding frame 51 can slide back and forth along the axial direction of the ejecting component 2, and the clamping block 21 can be telescopically moved to achieve the clamping and releasing of the clamping component 32.

[0070] Please refer to Figures 9 and 10. The pulling structure 54 includes a mounting groove 541 provided at the end of the support rod 52. A radial slideway 542 facing the axis of the top material component 2 is provided on the side wall of the mounting groove 541. An inner sliding block 543 is slidably connected in the mounting groove 541. One end of the inner sliding block 543 inserted into the mounting groove 541 is provided with a protrusion 544 inserted into the radial slideway 542. A first elastic member 545 is provided between the inner sliding block 543 and the bottom of the mounting groove 541 for limiting the inner sliding block to slide only along the radial slideway 542. An outer sliding block 546 is slidably connected to the inner sliding block 543. An axial slideway 547 is provided on the outer sliding block 546 for axial sliding connection of the inner and outer sliding blocks 546. A first inclined surface 548 is provided at one end of the outer sliding block 546 close to the support rod 52. The slot hole 22 is connected to the first inclined surface 548. A chamfer for extruding the first inclined surface 548 is provided at the corresponding position, so that when the outer sliding block 546 is pulled in the direction away from the clamping component 32 through the support rod 52 and the inner sliding block 543, the outer sliding block 546 is extruded in the axial direction of the top material component 2 under the extrusion of the first inclined surface 548 by the chamfer of the slot hole 22. At the same time, the first elastic member 545 is compressed by the inner sliding block 543, and the outer sliding block 546 is connected to the inner wall of the clamping block 21 through the second elastic member 551. In this way, the outer sliding block 546 can be extruded in the axial direction of the top material component 2, and the clamping block 21 is pulled by the second elastic member 551 to achieve the contraction of the clamping block 21 in the axial direction of the top material component 2, thereby realizing the release of the clamping state between the top material component 2 and the clamping component 32.

[0071] When the ejecting component 2 is inserted into the clamping component 32, please refer to FIG. 5 and FIG. 6 for the specific working process. Since the second inclined surface 211 is provided at one end of the clamping component 32 near the clamping component 32, the end of the clamping component 32 can squeeze the ejecting component 21 inward through the second inclined surface 211. When the ejecting component 21 is aligned with the clamping groove 322, the ejecting component 21 is automatically pushed into the clamping groove 322 under the elastic force of the second elastic member 551, thereby increasing the convenience of clamping the ejecting component 2 and the clamping component 32.

[0072] When releasing the clamping connection between the ejecting component 2 and the clamping component 32, please refer to Figures 6 and 7. First, pull the handle 53 to the right. Under the lever principle generated between the top of the slot 22 and the handle 53, pull the sliding frame 51 to the left. When the support rod 52 then pulls the outer sliding block 546 to the left through the inner sliding block 543, the inner wall of the slot 22 squeezes the first inclined surface 548, and the outer sliding block 546 can move toward the axis of the ejecting component 2. Then, the second elastic member 551 pulls the clamping block 21 to achieve the contraction of the clamping block 21, thereby completing the release of the clamping connection between the ejecting component 2 and the clamping component 32.

[0073] It should be specially noted that: the first elastic member 545 and the second elastic member 551 are both rigid elastic members, which can play a supporting role for the inner sliding block 543 and the clamping block 21, and specifically include but are not limited to spring structures.

[0074] Please refer to Figure 11, the second embodiment of the unlocking mechanism 5: based on the first embodiment of the unlocking mechanism 5, the second elastic member 551 is replaced by a connecting rod 552, that is, the outer sliding block 546 is connected to the inner wall of the clamping block 21 through the connecting rod 552, so that when the clamping connection between the ejecting component 2 and the clamping component is achieved, the contraction of the clamping block 21 can only be controlled by the handle 53, which can prevent the ejecting component 2 and the clamping component 32 from accidentally detaching.

[0075] It should be specially noted that: when the inner sliding block 543 moves to the right axial slideway 547 end of the axial slideway 547, there is an overlapping area between the outer sliding block 546 and the support rod 52 (that is, the outer sliding block 546 partially contacts the support rod 52), as shown in Figure 6, the overlapping area is used to prevent the block 21 from being subjected to pressure, and the outer sliding block 546 is squeezed by the connecting rod 552, and the outer sliding block 546 directly compresses the first elastic member 545 and shrinks toward the axial direction of the top material component 2, thereby playing a self-locking function; when the inner sliding block 543 moves to the left end of the axial slideway 547, there is no overlapping area between the outer sliding block 546 and the support rod 52 (that is, the outer sliding block 546 does not contact the support rod 52), as shown in Figure 7, at this time, the outer sliding block 546 can squeeze the inner sliding block 543 and the first elastic member 545, and move toward the axial direction of the top material component 2, thereby realizing the block 21 The contraction completes the release of the clamping relationship between the ejecting component 2 and the clamping component 32;

[0076] When using it specifically, please refer to FIG. 6 and FIG. 7. When the ejecting component 2 is engaged with the clamping component 32, first, the handle 53 is pulled to the right, and the sliding frame 51 is pulled to the left under the thrust generated by the lever principle between the top of the slot hole 22 and the handle 53. The inner sliding block 543 pulls the outer sliding block 546 to move to the left through the axial slideway 547. When there is no overlapping area between the outer sliding block 546 and the support rod 52, the chamfer in the slot hole 22 squeezes the first inclined surface 548 on the outer sliding block 546, which can squeeze the inner sliding block 543 and the first elastic member 545 to shrink toward the axial direction of the ejecting component 2, so that the clamping block 21 shrinks into the slot hole 22, so as to facilitate the ejecting component 2 and the clamping component 32 to be engaged;

[0077] After the block 21 is aligned with the slot 322, the support rod 52 is pulled in the opposite direction and pushed to the right to the bottom. At this time, the end of the support rod 52 overlaps with the outer sliding block 546 again. The overlapping area can effectively prevent the block 21 from being subjected to external pressure, causing the inner sliding block 543 to directly squeeze the first elastic member 545 and shrink, resulting in accidental release of the clamping connection, and the ejecting component 2 is separated from the clamping component 32. The ejecting component 2 may accidentally separate from the metal bar 4 during the movement, thereby further increasing the stability of the connection between the ejecting component 2 and the clamping component 32, and better ensuring the synchronous movement of the metal bar 4 and the ejecting component 2.

[0078] It should be specially noted that the second elastic member 551 in the first embodiment of the unlocking mechanism 5 and the connecting rod 552 in the second embodiment of the unlocking mechanism 5 are collectively referred to as a connecting member 55. The connecting member 55 in the present invention includes but is not limited to the above two types.

[0079] Please refer to FIGS. 12-14 , the third embodiment of the unlocking mechanism 5 includes a plurality of unlocking grooves 562 provided on the clamping member 32, the unlocking grooves 562 are communicated with the clamping grooves 322, a fixed shaft 563 parallel to the axis of the clamping member 32 is provided in the unlocking grooves 562, a pressing plate 564 is hingedly connected to the fixed shaft 563, an unlocking ring 565 is rotatably connected to the outer side of the clamping member 32, a plurality of unlocking hooks 566 corresponding to the pressing plates 564 are provided on the inner wall of the unlocking ring 565, and a third inclined surface 567 for pressing one end of the pressing plate 564 is provided on the unlocking hooks 566;

[0080] In this embodiment, the block 21 is directly installed in the slot 22 on the top material component 2 through the third elastic member 561. The installation method of the block 21 in the first embodiment can also be used. The commonality is that an elastic member needs to be installed on the inner side of the block 21 so that the block 21 can shrink when squeezed.

[0081] When in use, the unlocking ring 565 is rotated to squeeze one end of the pressing plate 564 through the third inclined surface 567 on the unlocking hook 566, so that the other end of the pressing plate 564 passes through the unlocking groove 562 to squeeze the block 21, and the block 21 squeezes the third elastic member 561 to achieve contraction. At this time, the pressing plate 564 and the inner wall of the clamping component 32 are in the same position. When the ejecting component 2 is pushed outward, the pressing plate 564 and the block 21 will not cause obstruction, and the ejecting component 2 can be separated from the clamping component 32, so that the ejecting component 2 can be replaced with a new clamping component 32 for clamping, and then continue to work;

[0082] When special explanation is needed, in the third embodiment of the unlocking mechanism 5 of the present invention, the installation and setting of the block 21 are simpler and more convenient, the production process requires the lowest difficulty and the lowest cost, and it is easy to produce.

[0083] It should be specially noted that a heating device is provided at one end of the rotating cylinder 33 extending into the powder processing housing 34 , which is used to heat the metal bar 4 to increase the temperature of the metal bar 4 .

[0084] When the present invention is working, the front support 1 can be driven by the first driving device 15 to make the front support 1 close to the middle support 3, so that the ejecting component 2 on the front support 1 is clamped with the clamping component 32. During the working process, the ejecting component 2 can push the metal bar 4 from the material receiving channel 311 into the rotating cylinder 33 under the drive of the second driving device 16, and cooperate with the guide groove 3312 on the inner wall of the rotating cylinder 33 under the action of the guide bar 3311 on the outer side of the clamping component 32, so that the metal bar 4 and the rotating cylinder 33 rotate synchronously, providing centrifugal force conditions for the molten material, so as to realize the preparation process of spherical metal powder, and when the remaining amount of the metal bar 4 is insufficient, the second driving device 16 can also pull the clamping component 32 out from the material receiving channel 311 through the ejecting component 2, so as to quickly replace the new metal bar 4, saving processing work to replace the metal bar 4 Reduce wasted time, increase preparation rate, and improve production output;

[0085] In addition, the loading rack 31 is provided with a plurality of material storage channels 311, and each material storage channel 311 is provided with a clamping component 32, which can not only clamp the metal bar 4 during operation to increase the stability of the metal bar 4 during rotation in the rotating cylinder 33, but also directly rotate the loading rack 31 when replacing a new metal bar 4 to switch the material storage channels 311, thereby realizing the function and role of quickly replacing the metal bar 4, and further improving the convenience and efficiency of replacing the metal bar 4;

[0086] At the same time, the ejecting component 2 is also provided with an unlocking mechanism 5 for quickly releasing the engagement between the card block 21 and the card slot 322, which can realize quick engagement when the ejecting component 2 is engaged with the clamping component 32, and can realize quick detachment when the metal bar 4 is replaced, which not only makes the operation more convenient and simple, but also can effectively save the time consumed in replacing the metal bar 4, and is very beneficial to improving the overall work efficiency and processing speed.

Claims

1. A device for preparing spherical metal powder for 3D printing, characterized in that: It comprises a frame, on which a front support (1), a middle support (3) and a rear tail support (6) are arranged; Front support (1): a material lifting component (2) that can extend toward the middle support (3) is mounted on the front support (1), and a retractable clamping block (21) is provided on the material lifting component (2); The middle support (3): a loading rack (31) is rotatably mounted at one end close to the front support (1), and a plurality of material receiving channels (311) for loading metal bars (4) are provided in the circumferential direction of the loading rack (31). When the loading rack (31) rotates, the positions of the plurality of material receiving channels (311) can correspond to the clamping blocks (21) one by one; A clamping component (32) is slidably mounted in each material receiving channel (311) and is used to clamp the metal bar material (4). An annular clamping groove (322) is provided on the inner wall of the clamping component (32); when the ejecting component (2) is inserted into the clamping component (32), the clamping block (21) can be clamped into the clamping groove (322); Rotating cylinder (33): rotatably mounted on the middle support (3), the plurality of material containing channels (311) can be aligned with the rotating cylinder (33) in sequence; when the material pushing component (2) extends in the direction of the middle support (3), the clamping component (32) and the metal bar (4) can be pushed into the rotating cylinder (33), so that the metal bar (4) and the rotating cylinder (33) rotate synchronously; An unlocking mechanism (5) is arranged on the ejecting component (2) or the clamping component (32) and controls the clamping block (21) to disengage from the annular clamping groove (322), thereby disengaging the clamping block (21) from the clamping groove (322), thereby realizing rapid disassembly and assembly of the ejecting component (2) and the clamping component (32); The unlocking mechanism (5) comprises: A sliding frame (51): slidably mounted on the top material component (2), the sliding frame (51) comprises a plurality of supporting rods (52), and the plurality of supporting rods (52) correspond one to one with the clamping blocks (21); Handle (53): hinged to one end of the sliding frame (51); Slot (22): opened on the top material component (2) and used for mounting the sliding frame (51) and the handle (53); A pulling structure (54): installed between the end of the support rod (52) and the clamping block (21); when the support rod (52) moves in a direction away from the middle support (3), the pulling structure (54) can shrink in the axial direction of the ejecting component (2); A connecting member (55) is arranged between the pulling structure (54) and the clamping block (21); when the pulling structure (54) contracts in the axial direction of the ejecting member (2), the connecting member (55) can contract towards the pulling clamping block (21) to release the clamping connection between the ejecting member (2) and the clamping member (32); The pulling structure (54) comprises a mounting groove (541) formed at the end of the support rod (52); a radial slideway (542) facing the axis of the lifting component (2) is formed on the side wall of the mounting groove (541); an inner sliding block (543) is slidably connected in the mounting groove (541); one end of the inner sliding block (543) inserted into the mounting groove (541) is provided with a protrusion (544) inserted into the radial slideway (542); a first elastic member (545) is provided between the inner sliding block (543) and the bottom of the mounting groove (541); an outer sliding block (546) is slidably connected to the inner sliding block (543); an axial slideway (547) is formed on the outer sliding block (546); and a first inclined surface (548) is provided at one end of the outer sliding block (546) close to the support rod (52); The rear tailstock (6) is slidably mounted on the frame and can move toward the middle support (3); Electrode holder (62): mounted on the rear tailstock (6), the electrode holder (62) is provided with a tungsten electrode head (63).

2. The device for preparing spherical metal powder for 3D printing according to claim 1, characterized in that: The connecting member (55) is a second elastic member (551), and a second inclined surface (211) is provided at one end of the clamping block (21) close to the clamping member (32).

3. The device for preparing spherical metal powder for 3D printing according to claim 1, characterized in that: The connecting member (55) is a connecting rod (552).

4. The device for preparing spherical metal powder for 3D printing according to claim 3, characterized in that: When the inner sliding block (543) moves to one end of the axial slideway (547) close to the clamping component (32), an overlapping area is formed between the outer sliding block (546) and the support rod (52), which is used to limit the contraction of the clamping block (21); when the inner sliding block (543) moves to one end of the axial slideway (547) close to the handle (53), the overlapping area between the outer sliding block (546) and the support rod (52) is released, thereby releasing the self-locking of the contraction of the clamping block (21).

5. The device for preparing spherical metal powder for 3D printing according to claim 1, characterized in that: The unlocking mechanism (5) comprises a third elastic member (561), the clamping block (21) is mounted on the ejecting member (2) via the third elastic member (561), a plurality of unlocking grooves (562) are provided on the clamping member (32), the unlocking grooves (562) are communicated with the clamping grooves (322), a fixed shaft (563) parallel to the axis of the clamping member (32) is provided in the unlocking groove (562), a pressing plate (564) is hingedly connected to the fixed shaft (563), an unlocking ring (565) is rotatably connected to the outer wall of the clamping member (32), a plurality of unlocking hooks (566) corresponding to the pressing plates (564) are provided on the inner wall of the unlocking ring (565), and the unlocking hooks (566) are provided with a third inclined surface (567) for pressing one end of the pressing plate (564).

6. The device for preparing spherical metal powder for 3D printing according to any one of claims 1 to 5, characterized in that: A powder processing housing (34) is provided at one end of the middle support (3) close to the rear tailstock (6), the rotating cylinder (33) is in communication with the powder processing housing (34), and an electrode inlet (341) is provided at one end of the powder processing housing (34) close to the rear tailstock (6); When the rear tailstock (6) moves to the position of the powder processing housing (34), the tungsten electrode head (63) can be inserted into the powder processing housing (34) through the electrode inlet (341); when the metal bar (4) approaches the tungsten electrode head (63) to a suitable distance, a plasma arc is generated between the two.

7. The device for preparing spherical metal powder for 3D printing according to any one of claims 1 to 5, characterized in that: A linkage mechanism (331) is provided between the clamping component (32) and the inner wall of the rotating cylinder (33), for achieving synchronous rotation of the metal bar (4) and the rotating cylinder (33).

8. The device for preparing spherical metal powder for 3D printing according to claim 7, characterized in that: The linkage mechanism (331) comprises a plurality of guide strips (3311) arranged on the outer wall of the clamping component (32), and guide grooves (3312) corresponding to the guide strips (3311) are provided on the inner wall of the material containing channel (311) and the rotating cylinder (33).

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