A mobile structure for a desktop electric arc additive manufacturing device and an additive manufacturing device

Abstract

The application relates to a moving structure of a desktop electric arc additive equipment and the additive equipment, relates to the technical field of additive equipment, and comprises a cooling medium supply device and a space moving piece, the space moving piece is connected with at least one of an additive processing head and a printing substrate, and drives the relative movement of the additive processing head and the printing substrate in a three-dimensional coordinate system; the space moving piece comprises a linear moving mechanism and a plane moving mechanism, the linear moving mechanism comprises a first lead screw and a first lead screw nut, a first cooling channel is arranged in the first lead screw, one end of the first cooling channel is an inlet, the other end is an outlet, the inlet is connected with the cooling medium supply device and can supply cooling medium into the first cooling channel, and the outlet is connected with the external environment. The application has the effects of effectively avoiding the deformation of the first lead screw caused by high-temperature heat radiation, improving the relative moving precision of the additive processing head and the printing substrate, and improving the quality of workpiece additive manufacturing.

Description

Technical Field

[0001] This application relates to the field of additive manufacturing equipment technology, and in particular to a mobile structure and additive manufacturing equipment for a desktop arc additive manufacturing equipment. Background Technology

[0002] Arc additive manufacturing equipment is a metal additive manufacturing system that uses an electric arc to melt metal wires and deposit material layer by layer. Its core features are low cost, high efficiency, and suitability for large-sized metal components. It is widely used in the manufacture of large structural parts (such as fuselage frames and ship ribs) in aerospace, shipbuilding, and engineering machinery industries. In additive manufacturing, the additive processing head moves relative to the printing substrate to achieve three-dimensional additive manufacturing of the workpiece.

[0003] In existing technologies, a mechanism consisting of a lead screw and a first lead screw nut is typically used to drive the additive manufacturing head and the printing substrate to move relative to each other, thereby achieving three-dimensional additive manufacturing of the workpiece. However, during arc additive manufacturing, the high-temperature heat radiation generated during the additive process can cause deformation of the lead screw drive, reducing the accuracy of the relative movement between the additive manufacturing head and the printing substrate, and consequently reducing the quality of the workpiece additive manufacturing. Therefore, existing moving mechanisms are not suitable for arc additive manufacturing, and there is an urgent need to develop a new moving structure for arc additive manufacturing equipment. Utility Model Content

[0004] To address the issue that high-temperature heat radiation during additive manufacturing can cause deformation of the lead screw drive, reducing the accuracy of the relative movement between the additive head and the printing substrate, and consequently lowering the quality of the workpiece additive manufacturing, this application provides a moving structure for a desktop arc additive manufacturing device and an additive manufacturing device.

[0005] The mobile structure of the desktop arc additive manufacturing equipment provided in this application adopts the following technical solution: A mobile structure and additive manufacturing equipment for a desktop electric arc additive manufacturing device include a cooling medium supply device and a spatial moving component connected to the housing of the additive manufacturing device. The additive processing head and the printing substrate are both disposed inside the housing of the additive manufacturing device. The spatial moving component is connected to at least one of the additive processing head and the printing substrate so as to drive the additive processing head and the printing substrate to move relative to each other in a three-dimensional coordinate system on the housing of the additive manufacturing device. The spatial moving component includes a line moving mechanism and a planar moving mechanism, wherein the line moving mechanism is disposed between the additive equipment housing and the printing substrate or additive processing head; The unidirectional drive mechanism includes a first lead screw and a first lead screw nut. A first cooling channel is formed inside the first lead screw. The first cooling channel is arranged along the axial direction of the first lead screw. One end of the first cooling channel is an inlet, and the other end is an outlet. The cooling medium supply device is connected to the inlet and can supply cooling medium into the first cooling channel. The outlet is connected to the external environment.

[0006] By adopting the above technical solution, in the arc additive manufacturing of the workpiece, the spatial moving component drives the additive processing head and the printing substrate to move relative to each other in a three-dimensional coordinate system, realizing three-dimensional additive operation on the workpiece. During this process, the cooling medium supply device supplies cooling medium to the first cooling channel inside the first lead screw. After heat exchange with the first lead screw, the cooling medium cools it. The cooled medium is then discharged from the outlet. This cooling of the first lead screw effectively prevents deformation caused by high-temperature heat radiation, improves the accuracy of the relative movement between the additive processing head and the printing substrate, and enhances the quality of the workpiece additive manufacturing.

[0007] Preferably, the first lead screw is arranged along the Z-axis in the three-dimensional coordinate system on the additive manufacturing equipment housing and is rotatably connected to the additive manufacturing equipment housing. The first lead screw nut is connected to the planar moving mechanism so that the first lead screw can drive the planar moving mechanism to slide along the Z-axis.

[0008] By adopting the above technical solution, the stability of the first lead screw rotation is improved by using the rotation of the first lead screw to drive the planar moving mechanism to slide along the Z-axis. The weight of the planar moving mechanism acts on the first lead screw along the Z-axis, reducing the bending moment received by the first lead screw in other directions in the three-coordinate system and preventing bending, thereby improving the stability of the first lead screw driving the printing substrate to slide.

[0009] Preferably, the first lead screw is provided with a rotary joint connected to the inlet, and the rotary joint is rotatably connected to the cooling medium supply device, so that the first lead screw is rotatably connected to the cooling medium supply device.

[0010] By adopting the above technical solution, the cooling medium supply device is rotatably connected to the first lead screw through a rotary joint, and provides cooling medium to the first cooling channel through the rotary joint, thereby improving the convenience of cooling medium supply.

[0011] Preferably, the cooling medium is a gas, and the external environment is a power element space isolated from the printing space, so as to be able to cool the equipment in the power element space.

[0012] By adopting the above technical solution and setting the cooling medium as a gas, the increase in the mass of the first lead screw when the cooling medium enters the first cooling channel can be reduced, and the impact of cooling medium leakage on additive manufacturing can be reduced. The cooling medium, after exchanging heat with the first lead screw, enters the power element space to cool the equipment within, effectively preventing overheating and improving the utilization rate of the cooling medium.

[0013] Preferably, it further includes a guide shaft set along the Z-axis, the guide shaft being slidably connected to the planar moving mechanism so as to guide the planar moving mechanism to slide along the Z-axis.

[0014] By adopting the above technical solution, the accuracy of the planar moving mechanism sliding on the Z-axis is improved by using the guide shaft to guide the planar moving mechanism to slide on the Z-axis.

[0015] Preferably, the planar moving mechanism is provided with a sliding sleeve adapted to the guide shaft, and the sliding sleeve is slidably sleeved on the guide shaft.

[0016] By adopting the above technical solution, the radial wobble of the guide shaft is limited by the cooperation between the guide shaft and the sliding sleeve, effectively avoiding the occurrence of offset or skew caused by external force or insufficient precision.

[0017] Preferably, a second cooling channel is provided inside the guide shaft, with one end of the second cooling channel being an air inlet and the other end being an air outlet. The cooling medium supply device is connected to the air inlet and can supply cooling medium into the second cooling channel. The air outlet is spatially connected to the power element.

[0018] By adopting the above technical solution, the cooling medium supply device provides cooling medium to the second cooling channel inside the guide shaft to cool and reduce the temperature of the guide shaft, thereby reducing the deformation of the guide shaft caused by high temperature heat radiation and improving the accuracy of the guide shaft in guiding the movement of the printing substrate.

[0019] Preferably, the cooling medium supply device includes a circulation conveying module and a cooling module. The power element space is connected to the air inlet and the rotary joint via pipe fittings. The cooling module is connected in series with the pipe fittings to cool the cooling medium. The conveying module is connected in series with the pipe fittings to circulate and convey the cooling medium.

[0020] By adopting the above technical solution, the cooling module cools and lowers the temperature of the cooling medium. The cooled medium is then conveyed by the conveying module to the first lead screw and guide shaft for cooling and heat exchange. The cooled medium after heat exchange flows into the power element space for further cooling and heat exchange of the equipment in the power element space. The cooled medium after further cooling and heat exchange flows back into the cooling module for cooling and lowering, realizing the cyclic cooling of the cooling medium, improving the recycling of the cooling medium, and making it more economical.

[0021] This application also provides a desktop arc additive manufacturing device using the following technical solution: A desktop electric arc additive manufacturing equipment, using the aforementioned mobile structure, further includes an additive manufacturing equipment housing, an additive processing head, and a feeding mechanism. A printing space is formed within the additive manufacturing equipment housing, and the feeding mechanism is connected to the additive processing head to deliver material to the additive processing head.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The cooling medium supply device supplies cooling medium into the first cooling channel inside the first lead screw. After the cooling medium exchanges heat with the first lead screw, it cools the first lead screw. The cooled medium after heat exchange is discharged from the outlet. By cooling the first lead screw with the cooling medium, deformation of the first lead screw caused by high temperature heat radiation can be effectively avoided, the accuracy of the relative movement between the additive processing head and the printing substrate can be improved, and the quality of workpiece additive manufacturing can be improved. 2. The cooling medium, after exchanging heat with the first lead screw, enters the power element space to cool the equipment in the power element space, effectively preventing the equipment in the power element space from overheating and improving the utilization rate of the cooling medium; 3. The cooling medium supply device provides cooling medium to the second cooling channel inside the guide shaft to cool and reduce the temperature of the guide shaft, thereby reducing the deformation of the guide shaft caused by high temperature heat radiation and improving the accuracy of the guide shaft in guiding the movement of the printing substrate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the moving structure of a desktop electric arc additive manufacturing equipment and the structure of the additive manufacturing equipment according to an embodiment of this application.

[0024] Figure 2 It is a cross-sectional view of the additive manufacturing equipment along the line connecting the first lead screw and the guide rod.

[0025] Figure 3 yes Figure 2 Enlarged view of section A.

[0026] Figure 4 yes Figure 2 Enlarged view of section B in the middle.

[0027] Figure 5 yes Figure 2 Enlarged view of section C.

[0028] Figure 6 yes Figure 2 Enlarged view of section D in the middle.

[0029] Figure 7 This is a schematic diagram showing the structure of the cooling medium supply device.

[0030] Figure 8 This is a schematic diagram showing the structure of the shunt pipe.

[0031] Figure 9 This is a structural diagram showing the X-moving mechanism and the Y-moving mechanism.

[0032] Figure 10 Figure 9 Enlarged view of section E in the middle.

[0033] Figure 11 yes Figure 9 Enlarged view of section F in the middle.

[0034] Figure 12 yes Figure 9 Enlarged view of section G in the middle.

[0035] Explanation of reference numerals in the attached drawings: 1. Additive manufacturing equipment housing; 11. Additive processing head; 12. Base plate; 13. Printing base; 14. Printing substrate; 15. Mounting plate; 16. Printing space; 17. Power component space; 18. First servo motor; 2. Cooling medium supply device; 21. Conveying module; 22. Cooling module; 23. Piping fitting; 231. Return pipe; 232. Conveying pipe; 233. Diverter pipe; 24. Rotary joint; 25. Gas connector; 3. Spatial moving component; 4. Line moving mechanism; 41. First lead screw; 42. First lead screw nut; 43. First cooling channel; 44. Outlet; 45. Inlet; 5. Planar moving mechanism; 51. X-moving mechanism; 511. Second lead screw; 5 12. Second lead screw nut; 513. First slide rail; 514. First slider; 515. Second servo motor; 516. First sliding key shaft; 517. First bevel gear; 518. Second bevel gear; 519. First rotary support; 52. Y-movement mechanism; 521. Third lead screw; 522. Third lead screw nut; 523. Second slide rail; 524. Second slider; 525. Third servo motor; 526. Second sliding key shaft; 527. Third bevel gear; 528. Fourth bevel gear; 529. Second rotary support; 53. Mounting bracket; 6. Guide shaft; 61. Guide shaft fixing block; 62. Sliding sleeve; 63. Second cooling channel; 64. Air outlet; 65. Air inlet; 7. Feeding mechanism. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-12 This application will be described in further detail.

[0037] This application discloses a moving structure for a desktop arc additive manufacturing device.

[0038] Reference Figure 1 , Figure 2A movable structure for a desktop electric arc additive manufacturing equipment includes a cooling medium supply device 2 and a spatial moving component 3 connected to the housing 1 of the additive manufacturing equipment. An installation plate 15 fixedly installed inside the housing 1 divides the interior of the housing into two mutually isolated spaces, namely a printing space 16 and two power element spaces 17. The printing space 16 is located below the two power element spaces 17. The printing substrate 14 is located in the printing space 16. The main body of the spatial moving component 3 is located in the printing space 16. All power input devices are located in the power element spaces 17. The spatial moving component 3 performs relative movement between the printing substrate 14 and the electric arc additive manufacturing head 11 along the three-dimensional coordinate system within the printing space 16. In this embodiment, the additive manufacturing head 11 is an electric arc welding gun. In other embodiments, the additive manufacturing head 11 can also be a laser powder feeding head.

[0039] In this embodiment, the additive manufacturing head 11 is fixedly connected to the mounting plate 15, and the printing substrate 14 is connected to the spatial moving component 3. The spatial moving component 3 drives the printing substrate 14 to move along a three-dimensional coordinate system composed of X, Y, and Z, so that the workpiece is additively manufactured on the printing substrate 14. In other embodiments, the relative displacement between the additive manufacturing head 11 and the printing substrate 14 can also be one of the following methods: 1. The printing substrate 14 is fixedly connected to the additive manufacturing equipment, and the spatial moving component 3 drives the additive manufacturing head 11 to move along the three-dimensional coordinate system formed by the X, Y, and Z axes; 2. The spatial moving component 3 drives the printing substrate 14 to move along the Z-axis, and the spatial moving component 3 drives the additive processing head 11 to move along the plane formed by the X and Y axes; 3. The spatial moving component 3 drives the printing substrate 14 to move along the Y-axis, and the spatial moving component 3 drives the additive processing head 11 to move along the plane formed by the X and Z axes; 4. The spatial moving component 3 drives the printing substrate 14 to move along the X-axis, and the spatial moving component 3 drives the additive processing head 11 to move along the plane formed by the Z and Y axes; 5. The spatial moving component 3 drives the printing substrate 14 to move along the plane formed by the X and Y axes, and the spatial moving component 3 drives the additive processing head 11 to move along the Z axis; 6. The spatial moving component 3 drives the printing substrate 14 to move along the plane formed by the X and Z axes, and the spatial moving component 3 drives the additive processing head 11 to move along the Y axis; 7. The spatial moving component 3 drives the printing substrate 14 to move along the plane formed by the Z and Y axes, and the spatial moving component 3 drives the additive processing head 11 to move along the X axis.

[0040] The spatial moving component 3 includes a line moving mechanism 4 and a plane moving mechanism 5. In this embodiment, the line moving mechanism 4 drives the printing substrate 14 to move along the Z-axis, and the plane moving mechanism 5 drives the printing substrate 14 to move along the plane formed by the X and Y axes, thereby realizing the movement of the printing substrate 14 in the three-dimensional coordinate system.

[0041] To improve the stability of the printing substrate 14 moving along the Z-axis, two sets of line movement mechanisms 4 are provided. These two sets of line movement mechanisms 4 are located on either side of the planar movement mechanism 5, corresponding one-to-one with the two power element spaces 17. Each line movement mechanism 4 includes a first lead screw 41 and a first lead screw nut 42. The first lead screw 41 is positioned along the Z-axis, and its two ends are rotatably connected to the mounting plate 15 and the base plate 12 of the additive manufacturing equipment via bearings. The planar movement mechanism 5 includes an X-movement mechanism 51, a Y-movement mechanism 52, and a mounting frame 53. The X-movement mechanism 51 and the Y-movement mechanism 52 are mounted on the mounting frame 53. The first lead screw nut 42 is fixedly mounted on the mounting frame 53 by bolts, and the first lead screw 41 passes through the first lead screw nut 42, driving the mounting frame 53 to slide along the Z-axis.

[0042] Reference Figure 2 , Figure 3 and Figure 4 The first lead screw 41 has a first cooling channel 43 inside. The first cooling channel 43 is arranged along the axial direction of the first lead screw 41. The premise of opening the first cooling channel 43 is to ensure the rigidity of the first lead screw 41. The two ends of the first cooling channel 43 are an outlet 44 that communicates with the external environment at the top and an inlet 45 located below the base plate 12 at the bottom. In this embodiment, the external environment refers to the environment other than the printing space 16. In this embodiment, the external environment is the power element space 17.

[0043] The cooling medium supply device 2 is connected to the inlet 45 and supplies cooling medium into the first cooling channel 43. In this embodiment, the cooling medium is a gas, specifically one of inert gases such as argon, nitrogen, or helium. Argon is preferred as the cooling medium in this embodiment. During the arc additive manufacturing process, the cooling medium supply device 2 supplies cooling medium into the first cooling channel 43 within the first lead screw 41. After heat exchange with the first lead screw 41, the cooling medium cools the first lead screw 41. The cooled medium is then discharged from the outlet 44. By cooling the first lead screw 41 with the cooling medium, deformation of the first lead screw 41 due to high-temperature heat radiation can be effectively avoided, improving the accuracy of the relative movement between the additive processing head 11 and the printing substrate 14, and improving the quality of the workpiece additive manufacturing.

[0044] Reference Figure 2 , Figure 5 and Figure 6A guide shaft 6 is provided between the base plate 12 and the mounting plate 15. Each first lead screw 41 corresponds to two guide shafts 6, which are located on both sides of the first lead screw 41. The two ends of each guide shaft 6 are fixedly connected to the mounting plate 15 and the base plate 12 through guide shaft fixing blocks 61, respectively. Sliding sleeves 62 corresponding to the guide shafts 6 are fixedly installed on the mounting bracket 53. Each guide shaft 6 has a second cooling channel 63. The second cooling channel 63 is arranged along the axial direction of the guide shaft 6. The two ends of the second cooling channel 63 are an air outlet 64 communicating with the power element space 17 and an air inlet 65 communicating with the cooling medium supply device 2. This allows the cooling medium supply device 2 to supply cold argon gas into the second cooling channel 63 to cool and reduce the temperature of the guide shaft 6, thereby reducing the deformation of the guide shaft 6 caused by high temperature heat radiation and improving the accuracy of the guide shaft 6 in guiding the movement of the printing substrate 14.

[0045] Reference Figure 7 , Figure 8 In this embodiment, the cooling medium supply device 2 includes a conveying module 21 and a cooling module 22. The power element space 17 is connected to the air inlet 65 and the air outlet 45 via a pipe fitting 23. The pipe fitting 23 includes a return pipe 231 and a conveying pipe 232. One end of the return pipe 231 is fixedly connected to the housing of the additive manufacturing equipment and communicates with the two power element spaces 17. The other end is connected to the cooling module 22, allowing the argon gas in the power element space 17 to flow back into the cooling module 22. The cooling module 22 can be one of an air-cooled cooler, a water-cooled cooler, or a phase-change liquid cooler, to cool the argon gas after heat exchange. The conveying module 21 is connected in series with the return pipe 231. The conveying module 21 is a fan that conveys the argon gas. The delivery pipe 232 is connected to the outlet of the cooling module 22, and the other end is connected to the inlet 45 of each first lead screw 41 and the air inlet 65 of the guide shaft 6 through the diversion pipe 233. Specifically, the diversion pipe 233 is connected to the air inlet 65 through the gas connector 25, and the diversion pipe 233 is connected to the first lead screw 41 through the rotary connector 24. The rotary connector 24 is a rotary gas connector. On the one hand, it realizes the connection between the diversion pipe 233 and the inlet 45, and the argon gas cooled by the cooling module 22 is supplied to the first cooling channel 43. On the other hand, it realizes the rotary connection between the diversion pipe 233 and the first lead screw 41, thereby improving the convenience of cold argon gas supply in the first channel.

[0046] The cooling module 22 cools the cooling medium. The cooled medium is then conveyed via the conveying module 21 to the first cooling channel 43 and the second cooling channel 63, where it cools and exchanges heat with the first lead screw 41 and the guide shaft 6. The cooled medium then flows into the power component space 17, where it further cools and exchanges heat with the equipment, effectively preventing overheating and improving the utilization rate of the cooling medium. The cooled medium, after heat exchange with the equipment in the power component space 17, flows back to the cooling module 22 via the return pipe 231 for further cooling, achieving cyclic cooling of the cooling medium, improving its recycling and making it more economical.

[0047] Reference Figure 9 The mounting plate 15 is fixedly equipped with a first servo motor 18 that corresponds one-to-one with the first lead screw 41. The first servo motor 18 is connected to the first lead screw 41 through a coupling and drives the first lead screw 41 to rotate.

[0048] Reference Figure 9 , Figure 10 and Figure 11 To improve the stability of the printing substrate 14 sliding on the X-axis, two sets of X-moving mechanisms 51 are provided. Each set of X-moving mechanisms 51 includes a second lead screw 511 and a second lead screw nut 512. The second lead screw 511 is arranged along the X-axis and is rotatably connected to the mounting bracket 53 through a rotating support. The second lead screw nut 512 is sleeved on the second lead screw 511. The two second lead screw nuts 512 are fixedly connected to a first slide rail 513 arranged along the Y-axis. A printing base 13 is sleeved on a first slider 514. The printing substrate 14 is fixedly installed on the printing base 13. The printing base 13 is slidably connected to the first slide rail 513 through the first slider 514. The mounting plate 15 is fixedly equipped with a second servo motor 515 corresponding to the second lead screw 511. The output shaft of the second servo motor 515 is set downward. Each second servo motor 515 has a first slide key shaft 516 connected to its output shaft via a coupling. The first slide key shaft 516 passes through the printing space 16 along the Z-axis. The first slide key shaft 516 is rotatably connected to the mounting plate 15 and the base plate 12. Each second lead screw 511 has a first bevel gear 517 coaxially fixed at one end opposite to the first sliding key shaft 516. The mounting bracket 53 has a second bevel gear 518 that meshes with the first bevel gear 517. The second bevel gear 518 and the mounting bracket 53 are rotatably connected by a first rotary support 519. The first sliding key shaft 516 passes through the first rotary support 519 and the second bevel gear 518, so that the key on the second bevel gear 518 cooperates with the guide keyway on the first sliding key shaft 516. This allows the second bevel gear 518 to slide along the Z-axis with the mounting bracket 53, and also to be driven to rotate by the first sliding key shaft 516.

[0049] Reference Figure 9 , Figure 10 and Figure 12 To improve the stability of the printing substrate 14 sliding on the Y-axis, two sets of Y-moving mechanisms 52 are provided. Each set of Y-moving mechanisms 52 includes a third lead screw 521 and a third lead screw nut 522. The third lead screw 521 is arranged along the Y-axis and is rotatably connected to the mounting bracket 53 through a rotating support. The third lead screw nut 522 is sleeved on the third lead screw 521. The two third lead screw nuts 522 are fixedly connected to a second slide rail 523 arranged along the X-axis. The second slide rail 523 passes through the printing base 13. The printing base 13 is slidably connected to the second slide rail 523 through a second slider 524. The mounting plate 15 is fixedly equipped with a third servo motor 525 corresponding to the third lead screw 521. The output shaft of the third servo motor 525 is set downward. A second slide key shaft 526 is connected to the output shaft of each third servo motor 525 through a coupling. The second slide key shaft 526 passes through the printing space 16 along the Z-axis. The second slide key shaft 526 is rotatably connected to the mounting plate 15 and the base plate 12. A third bevel gear 527 is coaxially fixed on one end of each third lead screw 521 opposite to the second slide key shaft 526. A fourth bevel gear 528 meshing with the third bevel gear 527 is provided on the mounting bracket 53. The fourth bevel gear 528 and the mounting bracket 53 are rotatably connected through a second rotary support 529. The second slide key shaft 526 passes through the second rotary support 529 and the fourth bevel gear 528, and the key on the fourth bevel gear 528 cooperates with the guide keyway on the second slide key shaft 526, so that the fourth bevel gear 528 can slide along the Z-axis with the mounting bracket 53, and can also be driven to rotate by the second slide key shaft 526.

[0050] When adjusting the planar position of the printing substrate 14, the second servo motor 515 drives the first slide key shaft 516 to rotate. The first slide key shaft 516 drives the first bevel gear 517 to rotate via the second bevel gear 518. The first bevel gear 517 drives the second lead screw 511 to rotate. The second lead screw 511 drives the second lead screw nut 512 to slide. The second lead screw nut 512 drives the printing base 13 to slide along the second slide rail 523 via the first slide rail 513, thereby adjusting the position of the printing substrate 14 along the X-axis. The third servo motor 525 drives the second slide key shaft 526 to rotate. The second slide key shaft 526 drives the fourth bevel gear 528 to rotate. The fourth bevel gear 528 drives the third bevel gear 527 to rotate. The third bevel gear 527 drives the third lead screw 521 to rotate. The third lead screw 521 drives the third lead screw nut 522 to slide. The third lead screw nut 522 drives the second guide rail to slide. The second guide rail drives the printing base 13 to slide along the first guide rail, thereby adjusting the position of the printing substrate 14 along the Y-axis. By placing the first servo motor 18, the second servo motor 515, and the third servo motor 525 within the power element space 17 on the mounting plate 15, argon gas is used to cool the motors, ensuring their stable operation. On the other hand, the high-temperature radiation within the printing space 16 is prevented from affecting the motors' operation.

[0051] Reference Figure 8 To improve the rotational stability of the first sliding key shaft 516 and the second sliding key shaft 526, cooling channels are also provided inside the first sliding key shaft 516 and the second sliding key shaft 526. The cooling channels are arranged along the axial direction of the sliding key shaft. The split pipe 233 is also connected to the first sliding key shaft 516 and the second sliding key shaft 526 through a rotary gas connector and is connected to the cooling channels. Cold argon gas is introduced into the cooling channels through the split pipe 233 and the rotary gas connector to cool the first sliding key shaft 516 and the second sliding key shaft 526. The cooling channels inside the first sliding key shaft 516 and the second sliding key shaft 526 are connected to the power element space 17, so that the argon gas after heat exchange with the sliding key shaft enters the power element space 17 to cool the equipment in the power element space 17.

[0052] The implementation principle of the moving structure of a desktop arc additive manufacturing equipment according to an embodiment of this application is as follows: During the arc additive printing process, the cooling medium supply device 2 continuously supplies cold argon gas into the first cooling channel 43 and the second cooling channel 63. The cold argon gas cools the first lead screw 41 and the guide shaft 6, effectively preventing deformation of the first lead screw 41 and the guide shaft 6 due to high-temperature heat radiation, improving the accuracy of the relative movement between the additive processing head 11 and the printing substrate 14, and improving the quality of the workpiece additive manufacturing. The heated argon gas enters the power element space 17 to cool the motor in the power element space 17, enabling the motor to work stably.

[0053] This application also discloses a desktop electric arc additive manufacturing device.

[0054] Reference Figure 1 , Figure 2 A desktop electric arc additive manufacturing device, using the aforementioned movable structure, further includes an additive manufacturing device housing 1, an additive processing head 11, and a feeding mechanism 7. A printing space 16 is formed inside the additive manufacturing device housing 1. The housing 1, in conjunction with a door structure, enables the opening and closing of the printing space 16, facilitating workpiece unloading and sealing of the printing space 16. In this embodiment, the additive processing head 11 is an electric arc welding torch, and the corresponding feeding mechanism 7 is a wire feeding mechanism. The wire feeding wheel in the wire feeding mechanism is driven to rotate by a motor, using friction to clamp the welding wire and push it forward. During the feeding process, the welding wire needs to pass through guiding components such as a wire guide tube to ensure it is accurately delivered to the arc action area along a predetermined path. When the welding wire is delivered to the arc action area in the welding torch, the high temperature generated by the arc melts the welding wire, performing three-dimensional additive manufacturing on the workpiece.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A movable structure for a desktop electric arc additive manufacturing device, characterized in that: Includes a cooling medium supply device (2) and a spatial moving component (3) connected to the additive manufacturing equipment housing (1). The additive manufacturing head (11) and the printing substrate (14) are both disposed in the printing space (16) inside the additive manufacturing equipment housing (1). The spatial moving component (3) is connected to at least one of the additive manufacturing head (11) and the printing substrate (14) so ​​as to drive the additive manufacturing head (11) and the printing substrate (14) to move relative to each other in the three-dimensional coordinate system on the additive manufacturing equipment housing (1). The spatial moving component (3) includes a line moving mechanism (4) and a planar moving mechanism (5). The line moving mechanism (4) is disposed between the additive equipment housing (1) and the printing substrate (14) or the additive processing head (11). The line moving mechanism (4) includes a first lead screw (41) and a first lead screw nut (42). A first cooling channel (43) is provided in the first lead screw (41). The first cooling channel (43) is arranged along the axial direction of the first lead screw (41). One end of the first cooling channel (43) is an inlet (45), and the other end is an outlet (44). The cooling medium supply device (2) is connected to the inlet (45) and can supply cooling medium to the first cooling channel (43). The outlet (44) is connected to the external environment.

2. The moving structure of the desktop electric arc additive manufacturing equipment according to claim 1, characterized in that: The first lead screw (41) is set along the Z-axis in the three-dimensional coordinate system on the additive manufacturing equipment housing (1) and is rotatably connected to the additive manufacturing equipment housing (1). The first lead screw nut (42) is connected to the planar moving mechanism (5) so that the first lead screw (41) can drive the planar moving mechanism (5) to slide along the Z-axis.

3. The moving structure of the desktop electric arc additive manufacturing equipment according to claim 1, characterized in that: The first lead screw (41) is provided with a rotary joint (24) connected to the inlet (45). The rotary joint (24) is rotatably connected to the cooling medium supply device (2) so that the first lead screw (41) is rotatably connected to the cooling medium supply device (2).

4. The moving structure of the desktop electric arc additive manufacturing equipment according to claim 3, characterized in that: The cooling medium is a gas, and the external environment is a power element space (17) isolated from the printing space (16) so as to cool the equipment in the power element space (17).

5. The moving structure of the desktop arc additive manufacturing equipment according to claim 4, characterized in that: It also includes a guide shaft (6) set along the Z-axis, which is slidably connected to the planar moving mechanism (5) so as to guide the planar moving mechanism (5) to slide along the Z-axis.

6. The moving structure of the desktop arc additive manufacturing equipment according to claim 5, characterized in that: The planar moving mechanism (5) is provided with a sliding sleeve (62) adapted to the guide shaft (6), and the sliding sleeve (62) is slidably sleeved on the guide shaft (6).

7. The moving structure of the desktop electric arc additive manufacturing equipment according to claim 5, characterized in that: The guide shaft (6) has a second cooling channel (63) inside. One end of the second cooling channel (63) is an air inlet (65) and the other end is an air outlet (64). The cooling medium supply device (2) is connected to the air inlet (65) and can supply cooling medium to the second cooling channel (63). The air outlet (64) is connected to the power element space (17).

8. The moving structure of the desktop electric arc additive manufacturing equipment according to claim 7, characterized in that: The cooling medium supply device (2) includes a circulation conveying module (21) and a cooling module (22). The power element space (17) is connected to the air inlet (65) and the rotary joint (24) through a pipe fitting (23). The cooling module (22) is connected in series on the pipe fitting (23) to cool the cooling medium. The conveying module (21) is connected in series on the pipe fitting (23) to circulate and convey the cooling medium.

9. A desktop electric arc additive manufacturing device, using the moving structure of the desktop electric arc additive manufacturing device according to any one of claims 1-8, characterized in that: It also includes an additive manufacturing equipment housing (1), an additive manufacturing head (11), and a feeding mechanism (7). A printing space (16) is formed inside the additive manufacturing equipment housing (1). The feeding mechanism (7) is connected to the additive manufacturing head (11) so as to be able to deliver materials to the additive manufacturing head (11).

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