Vacuum chamber built-in wire feeding device for electron beam fuse additive manufacturing

Abstract

The invention discloses a vacuum chamber built-in wire feeding device for electron beam fuse wire additive manufacturing, belongs to the field of electron beam additive manufacturing, and solves the problems that as an existing wire feeding mechanism is arranged outside a vacuum chamber, the vacuum degree is easily reduced in the printing process, and the printing process is interrupted; the problem that due to the fact that thin metal wires and soft metal wires which are prone to bending deformation cannot continuously pass through a vacuum sealing gasket, selection of the metal wires and flexibility of electron beam fuse additive manufacturing are limited is solved. The wire feeding gun barrel and the wire feeding device can adjust the wire feeding angle according to the feeding direction, wire poking in the printing process is avoided, the number of built-in wire feeding mechanisms can be increased or decreased according to actual use requirements, multi-angle and multi-wire printing can be achieved, and the printing efficiency is improved. And the stability and continuity of printing work are ensured. The wire feeding device is mainly used for electron beam fuse wire additive manufacturing.

Description

Technical Field

[0001] The invention belongs to the field of electron beam additive manufacturing, and in particular relates to a wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing. Background Art

[0002] The concept of additive manufacturing was proposed in the late 1980s. This method mainly uses high-energy beams to realize the preparation of physical parts by stacking materials point by point and layer by layer. Compared with traditional processing and forming methods, the additive manufacturing process does not require molds, is not restricted by the shape of the formed parts, has a short R&D cycle, high precision, and flexible forming. It has shown great application advantages and potential in the fields of aerospace, weapons and equipment, biomedicine and remanufacturing, and has brought disruptive changes to the industrial field. The heat sources of additive manufacturing technology mainly include arc, plasma, laser, electron beam, etc. Among them, electron beam is the best heat source for additive manufacturing of high-temperature alloys, refractory alloys and active metals due to its high energy density, no metal reflection, and use in a high vacuum environment. At present, electron beam fuse additive manufacturing with wire as raw material has the characteristics of high manufacturing efficiency and the ability to form large-size components. It has greater development potential and is deeply favored by the fields of aerospace, weapons and equipment manufacturing, and has gradually become a research hotspot.

[0003] The wire feeding mechanism placed outside the vacuum chamber is prone to vacuum drop during printing due to sealing problems, resulting in interruption of the printing process; thin metal wire and soft metal wire that are easy to bend and deform cannot pass through the vacuum sealing pad continuously, limiting the working flexibility and usage requirements of the metal wire. Summary of the invention

[0004] The present invention aims to solve the problems that the existing wire feeding mechanism is arranged outside the vacuum chamber, the vacuum degree is easily reduced during the printing process, resulting in interruption of the printing process; and the thin metal wire and soft metal wire that are easy to bend and deform cannot continuously pass through the vacuum sealing pad, which limits the selection of metal wires and the flexibility of electron beam fuse additive manufacturing. Thus, a wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing is provided;

[0005] A wire feeding device built into a vacuum chamber for electron beam fused wire additive manufacturing, the wire feeding device is arranged in the vacuum chamber, the wire feeding device comprises a wire feeding gun rod moving and rotating device, a wire feeding gun rod, a wire feeding mechanism moving device, a wire feeding gun rod moving guide rail, a wire feeding mechanism moving guide rail, a wire reel box and a wire feeding mechanism; the wire feeding gun rod moving guide rail and the wire feeding mechanism moving guide rail are both arranged on the inner top of the vacuum chamber and fixedly connected to the vacuum chamber, the wire feeding gun rod moving and rotating device is arranged on the wire feeding gun rod moving guide rail and can reciprocate along the extension direction of the wire feeding gun rod moving guide rail, the wire feeding gun rod is installed on the wire feeding gun rod moving and rotating device, the wire feeding mechanism moving device is arranged on the wire feeding mechanism moving guide rail and can reciprocate along the extension direction of the wire feeding mechanism moving guide rail, the wire feeding mechanism is installed on the wire feeding mechanism moving device, the wire reel box is installed on the inner wall of the vacuum chamber, a wire winding shaft is inserted in the wire reel box, and the wire winding shaft is rotatably connected to the wire reel box, a metal wire is wound around the wire winding shaft, and one end of the metal wire is connected to the wire feeding gun rod through the wire feeding mechanism;

[0006] Furthermore, an electron beam lower beam hole is processed at the center of the inner top of the vacuum chamber, an electron gun is installed on the outer top of the vacuum chamber, and the beam end of the electron gun is arranged corresponding to the electron beam lower beam hole;

[0007] Furthermore, a working platform is provided on the inner bottom of the vacuum chamber, the working platform is a six-degree-of-freedom workbench, and a substrate is installed on the top of the working platform, and the substrate is used to carry the printed workpiece;

[0008] Furthermore, the wire feeding gun rod moving guide rail and the wire feeding mechanism moving guide rail are both semi-arc guide rails, and the diameter of the arc where the wire feeding mechanism moving guide rail is located is larger than the diameter of the arc where the wire feeding gun rod moving guide rail is located, the wire feeding mechanism moving guide rail and the wire feeding gun rod moving guide rail are sequentially sleeved on the outside of the electron beam lower beam hole, and the wire feeding mechanism moving guide rail, the wire feeding gun rod moving guide rail and the electron beam lower beam hole are concentrically arranged;

[0009] Furthermore, the wire feeding gun rod movable guide rail comprises a guide rail body and two end covers, the two end covers are respectively arranged at both ends of the guide rail body and are detachably connected to the guide rail body, a guide rack is arranged on one side inner wall of the guide groove in the guide rail body, and the wire feeding mechanism movable guide rail has the same composition structure as the wire feeding gun rod movable guide rail;

[0010] Furthermore, the wire feeding gun rod moving and rotating device includes a rotating drive mechanism, a No. 1 moving drive mechanism, a No. 1 transmission mechanism, a No. 1 moving shell, a No. 1 connecting pipe, a No. 1 sliding block, a mounting support plate and a No. 1 driving gear. The mounting support plate is arranged at the bottom of the No. 1 moving shell, and the mounting support plate is detachably connected to the No. 1 moving shell, the No. 1 connecting pipe is fixed to the top of the No. 1 moving shell in the vertical direction, and the bottom end of the No. 1 connecting pipe is connected to the top of the No. 1 moving shell, the No. 1 sliding block is arranged at the top of the No. 1 connecting pipe, a horizontal hole is processed in the No. 1 sliding block, the No. 1 sliding block and the No. 1 connecting pipe are integrally formed, and the No. 1 connecting pipe is connected to The horizontal hole in the No. 1 sliding block is connected, the rotation drive mechanism and the No. 1 mobile drive mechanism are both installed in the No. 1 mobile housing, the top end of the wire feeding gun rod passes through the mounting support plate and extends into the No. 1 mobile housing, and the top end of the wire feeding gun rod is transmission-connected with the power output end of the rotation drive mechanism, the No. 1 transmission mechanism is arranged in the cavity formed by the No. 1 connecting pipe and the horizontal hole, and one end of the No. 1 transmission mechanism extends into the No. 1 mobile housing and is transmission-connected with the power output end of the No. 1 mobile drive mechanism, the other end of the No. 1 transmission mechanism extends to the outside of the No. 1 sliding block and is inserted into the No. 1 driving gear, and the No. 1 driving gear is meshed with the guide rack teeth;

[0011] The upper part of the wire feeding gun rod is rotatably connected to the mounting support plate through a rotating bearing;

[0012] The rotary drive mechanism comprises a rotary motor, a rotary driving gear and a rotary driven gear. The rotary motor is installed in a No. 1 mobile housing. The rotary driving gear is sleeved on the power output shaft of the rotary motor. The rotary driven gear is sleeved on the top of the wire feeding gun rod. The rotary driving gear is transmission-connected with the rotary driven gear.

[0013] The No. 1 mobile driving mechanism comprises a No. 1 driving motor and a No. 1 driving gear. The No. 1 driving motor is installed in the No. 1 mobile housing. The No. 1 driving gear is mounted on the power output shaft of the No. 1 driving motor. The No. 1 driving motor is connected to the No. 1 transmission mechanism through the No. 1 driving gear.

[0014] The first transmission mechanism comprises a first gear mounting shaft, a first mounting shaft transmission gear, a first upper transmission gear, a first transmission shaft and a first lower transmission gear. The first transmission shaft is inserted in the first connecting pipe and is rotatably connected with the first connecting pipe through a bearing. One end of the first transmission shaft extends into the first moving housing and is fitted with the first lower transmission gear. The first transmission shaft is transmission-connected with the first driving motor through the cooperation of the first lower transmission gear and the first driving gear. The other end of the first transmission shaft is fitted with the first upper transmission gear. The first gear mounting shaft is inserted in the horizontal hole in the first sliding block, and one end of the first gear mounting shaft is rotatably connected with the first sliding block through a bearing. The first gear mounting shaft is fitted with the first mounting shaft transmission gear and is transmission-connected with the first transmission shaft through the cooperation of the first mounting shaft transmission gear and the first upper transmission gear. The other end of the first gear mounting shaft extends outside the first sliding block and is inserted in the first driving gear.

[0015] Further, the No. 1 sliding block is an arc-shaped block, and the No. 1 sliding block is matched with the guide rail body, the No. 1 driving gear is located on the inner arc surface of the No. 1 sliding block, and the two ends of the outer arc surface of the No. 1 sliding block are respectively embedded with a No. 1 side rolling roller, and each No. 1 side rolling roller is rotatably connected to the No. 1 sliding block, and the bottom of the No. 1 sliding block is embedded with two groups of No. 1 bottom rolling rollers along the arc extension direction of the No. 1 sliding block, and each No. 1 bottom rolling roller is rotatably connected to the No. 1 sliding block;

[0016] Furthermore, the wire feeding mechanism moving device includes a No. 2 moving drive mechanism, a No. 2 transmission mechanism, a No. 2 moving shell, a No. 2 connecting pipe, a No. 2 sliding block and a No. 2 driving gear. The wire feeding mechanism fixing plate is arranged at the bottom of the No. 2 moving shell, and the wire feeding mechanism fixing plate is detachably connected to the No. 2 moving shell. The No. 2 connecting pipe is fixed to the top of the No. 2 moving shell in the vertical direction, and the bottom end of the No. 2 connecting pipe is connected to the top of the No. 2 moving shell. The No. 2 sliding block is arranged at the top of the No. 2 connecting pipe. A horizontal hole is machined in the No. 2 sliding block. The second connecting pipe is integrally formed with the second connecting pipe, and the second connecting pipe is connected with the horizontal hole in the second sliding block. The second mobile driving mechanism is installed in the second mobile housing. The second transmission mechanism is arranged in the cavity formed by the second connecting pipe and the horizontal hole. One end of the second transmission mechanism extends into the second mobile housing and is transmission-connected with the power output end of the second mobile driving mechanism. The other end of the second transmission mechanism extends to the outside of the second sliding block and is inserted into the second driving gear. The second driving gear is meshed with the rack part in the moving guide rail of the wire feeding mechanism.

[0017] The second mobile driving mechanism includes a second driving motor and a second driving gear. The second driving motor is installed in the second mobile housing. The second driving gear is mounted on the power output shaft of the second driving motor. The second driving motor is connected to the second transmission mechanism through the second driving gear.

[0018] The second transmission mechanism includes a second gear mounting shaft, a second mounting shaft transmission gear, a second upper transmission gear, a second transmission shaft and a second lower transmission gear. The second transmission shaft is inserted in the second connecting pipe and is rotatably connected to the second connecting pipe through a bearing. One end of the second transmission shaft extends to the second movable housing and is fitted with the second lower transmission gear. The second transmission shaft is transmission-connected to the second driving motor through the cooperation of the second lower transmission gear and the second driving gear. The other end of the second transmission shaft is fitted with the second upper transmission gear. The second gear mounting shaft is inserted in the horizontal hole in the second sliding block, and one end of the second gear mounting shaft is rotatably connected to the second sliding block through a bearing. The second gear mounting shaft is fitted with the second mounting shaft transmission gear and is transmission-connected to the second transmission shaft through the cooperation of the second mounting shaft transmission gear and the second upper transmission gear. The other end of the second gear mounting shaft extends outside the second sliding block and is inserted in the No. 2 driving gear.

[0019] The No. 2 sliding block is an arc-shaped block, and the No. 2 sliding block is matched with the guide rail body of the moving guide rail of the wire feeding mechanism, the No. 2 driving gear is located on the inner arc surface of the No. 2 sliding block, and two ends of the outer arc surface of the No. 2 sliding block are respectively embedded with a No. 2 side rolling roller, and each No. 2 side rolling roller is rotatably connected to the No. 2 sliding block, and two groups of No. 2 bottom rolling rollers are embedded at the bottom of the No. 2 sliding block along the arc extension direction of the No. 2 sliding block, and each No. 2 bottom rolling roller is rotatably connected to the No. 2 sliding block;

[0020] Furthermore, the wire feeding mechanism includes a servo motor and two wire feeding wheels, the servo motor is installed on one side of the wire feeding mechanism fixing plate, the two wire feeding wheels are symmetrically arranged at the bottom of the wire feeding mechanism fixing plate along the center line of the width direction of the wire feeding mechanism fixing plate, and each wire feeding wheel is rotatably connected to the wire feeding mechanism fixing plate, the metal wire is located between the two wire feeding wheels, and the power output end of the servo motor drives the two wire feeding wheels to rotate towards each other through the transmission mechanism to realize the wire feeding action;

[0021] Furthermore, the wire feeding mechanism also includes two wire guide tubes, one wire guide tube is arranged between the wire reel box and the two wire feeding wheels, and one end of the wire guide tube is connected to the wire outlet end of the wire reel box, and the other end of the wire guide tube is fixedly connected to the bottom of the wire feeding mechanism fixing plate, and the other wire guide tube is arranged between the two wire feeding wheels and the wire feeding gun rod, and one end of the wire guide tube is fixedly connected to the bottom of the wire feeding mechanism fixing plate, and the other end of the wire guide tube is connected to the wire inlet end of the wire feeding gun rod;

[0022] The beneficial effects of this application compared to the prior art are as follows:

[0023] The present application provides a wire feeding device with a built-in vacuum chamber for electron beam fused wire additive manufacturing, in which the wire feeding mechanism is completely placed inside the vacuum chamber to prevent the rotation of the wire feeding gun rod and the wire feeding and other actions from causing air leakage in the vacuum chamber and resulting in interruption of the printing process. The wire feeding gun rod and the wire feeding device can adjust the wire feeding angle according to the moving direction to avoid wire poking during the printing process. The built-in wire feeding device can realize the continuous delivery of thin filaments and soft metal wires that are easy to bend, ensuring the stability and continuity of the printing work.

[0024] The present application provides a built-in wire feeding device for electron beam fused wire additive manufacturing in a vacuum chamber, which has good versatility and can adjust the wire feeding mechanism, wire feeding mechanism moving device, wire reel box, wire feeding gun rod moving and rotating device and the number of wire feeding gun rods according to actual working conditions to adapt to the needs of different working conditions such as single wire and multi-wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the wire feeding device built into the vacuum chamber of the present application;

[0026] Figure 2 This is a bottom view schematic diagram of the wire feeding device built into the vacuum chamber of the present application;

[0027] Figure 3 This is an external schematic diagram of the wire feeding gun rod moving and rotating device in the wire feeding device built into the vacuum chamber of the present application;

[0028] Figure 4 This is an internal schematic diagram of a wire feeding gun rod moving and rotating device in a wire feeding device built into a vacuum chamber according to the present application;

[0029] Figure 5 It is a top view schematic diagram of the wire feeding gun rod moving and rotating device in the wire feeding device built into the vacuum chamber of the present application;

[0030] Figure 6 This is an external schematic diagram of a moving device of a wire feeding mechanism in a wire feeding device built into a vacuum chamber according to the present application;

[0031] Figure 7 This is an internal schematic diagram of a moving device of a wire feeding mechanism in a wire feeding device built into a vacuum chamber according to the present application;

[0032] Figure 8 This is a schematic diagram of the structure of the wire feeding gun rod moving guide rail in the wire feeding device built into the vacuum chamber described in the present application;

[0033] In the figure, 1 electron gun, 2 wire feeding gun rod moving and rotating device, 201 No. 1 moving housing, 202 No. 1 connecting pipe, 203 No. 1 sliding block, 204 mounting support plate, 205 No. 1 driving gear, 206 No. 1 bottom rolling roller, 207 No. 1 side rolling roller, 208 No. 1 gear mounting shaft, 209 No. 1 mounting shaft transmission gear, 210 No. 1 upper transmission gear, 211 No. 1 transmission shaft, 212 No. 1 lower transmission gear, 213 No. 1 driving motor, 214 No. 1 driving gear, 215 rotating motor, 216 rotating driving gear, 217 rotating driven gear, 218 rotating bearing, 3 wire feeding gun rod, 4 wire feeding mechanism moving device , 401 No.2 moving housing, 402 No.2 connecting pipe, 403 No.2 sliding block, 405 No.2 driving gear, 406 No.2 bottom rolling roller, 407 No.2 side rolling roller, 408 No.2 gear mounting shaft, 409 No.2 mounting shaft transmission gear, 410 No.2 upper transmission gear, 411 No.2 transmission shaft, 412 No.2 lower transmission gear, 413 No.2 driving motor, 414 No.2 driving gear, 5 wire mechanism fixing plate, 6 wire guide tube, 7 wire feeding gun rod moving guide rail, 8 wire feeding mechanism moving guide rail, 9 base plate, 10 working platform, 11 vacuum chamber, 12 wire reel box, 13 wire feeding wheel, 14 electron beam lower beam hole and 15 servo motor. DETAILED DESCRIPTION

[0034] Specific implementation method 1: Combination Figures 1 to 8 Description of this embodiment. In this embodiment, a wire feeding device is provided in a vacuum chamber for electron beam fuse additive manufacturing. The wire feeding device is arranged in a vacuum chamber 11. The wire feeding device includes a wire feeding gun rod moving and rotating device 2, a wire feeding gun rod 3, a wire feeding mechanism moving device 4, a wire feeding gun rod moving guide rail 7, a wire feeding mechanism moving guide rail 8, a wire reel box 12 and a wire feeding mechanism; the wire feeding gun rod moving guide rail 7 and the wire feeding mechanism moving guide rail 8 are both arranged on the inner top of the vacuum chamber 11 and fixedly connected to the vacuum chamber 11, and the wire feeding gun rod moving and rotating device 2 is arranged on the wire feeding gun rod moving guide rail 7 and can reciprocate along the extension direction of the wire feeding gun rod moving guide rail 7, the wire feeding gun rod 3 is installed on the wire feeding gun rod moving and rotating device 2, the wire feeding mechanism moving device 4 is arranged on the wire feeding mechanism moving guide rail 8 and can reciprocate along the extension direction of the wire feeding mechanism moving guide rail 8, the wire feeding mechanism is installed on the wire feeding mechanism moving device 4, the wire reel box 12 is installed on the inner wall of the vacuum chamber 11, a wire winding shaft is inserted in the wire reel box 12, and the wire winding shaft is rotatably connected to the wire reel box 12, the wire winding shaft is wound with metal wire, and one end of the metal wire is connected to the wire feeding gun rod 3 through the wire feeding mechanism.

[0035] The present embodiment provides a wire feeding device with a built-in vacuum chamber for electron beam fused wire additive manufacturing, in which the wire feeding mechanism is completely placed inside the vacuum chamber to prevent the rotation of the wire feeding gun rod and the wire feeding and other actions from causing air leakage in the vacuum chamber and resulting in interruption of the printing process. The wire feeding gun rod and the wire feeding device can adjust the wire feeding angle according to the moving direction to avoid wire poking during the printing process. The built-in wire feeding device can realize the continuous delivery of thin wires and soft metals that are easy to bend, ensuring the stability and continuity of the printing work.

[0036] Specific implementation method 2: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the first embodiment is that an electron beam lower beam hole 14 is processed at the center of the top of the vacuum chamber 11, an electron gun 1 is installed on the outer top of the vacuum chamber 11, and the beam end of the electron gun 1 is arranged corresponding to the electron beam lower beam hole 14. The other components and connection methods are the same as those of the first embodiment.

[0037] Specific implementation method three: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the second embodiment is that a work platform 10 is provided on the inner bottom of the vacuum chamber 11. The work platform 10 is a six-degree-of-freedom workbench. A substrate 9 is installed on the top of the work platform 10. The substrate 9 is used to carry the printed workpiece. Other components and connection methods are the same as those of the second embodiment.

[0038] In this embodiment, the center of the substrate 9 and the center of the work platform 10 are located on the same vertical line. The work platform 10 drives the substrate 9 to move to cooperate with the wire feeding gun rod 3 to complete the working trajectory of the printing work. The metal wire transported in the wire feeding gun rod 3 is melted by the electron gun 1 to form an additive material. After cooling, the additive material is coated on the substrate 9 layer by layer to form the workpiece body.

[0039] Specific implementation method four: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the third embodiment is that the wire feeding gun rod moving guide rail 7 and the wire feeding mechanism moving guide rail 8 are both semi-arc guide rails, and the diameter of the arc where the wire feeding mechanism moving guide rail 8 is located is larger than the diameter of the arc where the wire feeding gun rod moving guide rail 7 is located. The wire feeding mechanism moving guide rail 8 and the wire feeding gun rod moving guide rail 7 are sequentially sleeved on the outside of the electron beam lower beam hole 14, and the wire feeding mechanism moving guide rail 8, the wire feeding gun rod moving guide rail 7 and the electron beam lower beam hole 14 are concentrically arranged. Other components and connection methods are the same as those of the third embodiment.

[0040] Specific implementation method five: Combination Figures 1 to 8This embodiment is described. The difference between this embodiment and the fourth embodiment is that the wire feeding gun rod movable guide rail 7 includes a guide rail body 701 and two end covers 702. The two end covers 702 are respectively arranged at both ends of the guide rail body 701 and are detachably connected to the guide rail body 701. A guide rack 703 is provided on the inner wall of one side of the guide groove in the guide rail body 701. The wire feeding mechanism movable guide rail 8 has the same composition structure as the wire feeding gun rod movable guide rail 7. Other components and connection methods are the same as those in the fourth embodiment.

[0041] In combination with the description of the fourth and fifth embodiments, the end cover 702 is used to seal and limit the end of the guide rail body 701 to prevent the slider from sliding out of the guide rail body 701 due to misoperation.

[0042] Specific implementation method six: Combination Figures 1 to 8 The present embodiment is described. The present embodiment is different from the specific embodiment 5 in that the wire feeding gun rod moving and rotating device 2 includes a rotation drive mechanism, a No. 1 mobile drive mechanism, a No. 1 transmission mechanism, a No. 1 mobile housing 201, a No. 1 connecting pipe 202, a No. 1 sliding block 203, a mounting support plate 204 and a No. 1 driving gear 205. The mounting support plate 204 is arranged at the bottom of the No. 1 mobile housing 201, and the mounting support plate 204 is detachably connected to the No. 1 mobile housing 201. The No. 1 connecting pipe 202 is fixed to the top of the No. 1 mobile housing 201 in the vertical direction, and the bottom end of the No. 1 connecting pipe 202 is connected to the top of the No. 1 mobile housing 201. The No. 1 sliding block 203 is arranged at the top of the No. 1 connecting pipe 202. A horizontal hole is machined in the No. 1 sliding block 203. The No. 1 sliding block 203 is connected to a The No. 1 connecting pipe 202 is integrally formed, and the No. 1 connecting pipe 202 is connected to the horizontal hole in the No. 1 sliding block 203. The rotation drive mechanism and the No. 1 mobile drive mechanism are both installed in the No. 1 mobile housing 201. The top end of the wire feeding gun rod 3 passes through the mounting bracket 204 and extends into the No. 1 mobile housing 201, and the top end of the wire feeding gun rod 3 is transmission-connected with the power output end of the rotation drive mechanism. The No. 1 transmission mechanism is arranged in the cavity formed by the No. 1 connecting pipe 202 and the horizontal hole, and one end of the No. 1 transmission mechanism extends into the No. 1 mobile housing 201 and is transmission-connected with the power output end of the No. 1 mobile drive mechanism. The other end of the No. 1 transmission mechanism extends to the outside of the No. 1 sliding block 203 and is inserted into the No. 1 driving gear 205, and the No. 1 driving gear 205 is meshed with the guide rack 703.

[0043] The upper part of the wire feeding gun rod 3 is rotatably connected to the mounting support plate 204 via a rotating bearing 218;

[0044] The rotation driving mechanism includes a rotation motor 215, a rotation driving gear 216 and a rotation driven gear 217. The rotation motor 215 is installed in the first mobile housing 201. The rotation driving gear 216 is sleeved on the power output shaft of the rotation motor 215. The rotation driven gear 217 is sleeved on the top of the wire feeding gun rod 3, and the rotation driving gear 216 is transmission-connected with the rotation driven gear 217.

[0045] The first mobile driving mechanism includes a first driving motor 213 and a first driving gear 214. The first driving motor 213 is installed in the first mobile housing 201. The first driving gear 214 is mounted on the power output shaft of the first driving motor 213. The first driving motor 213 is connected to the first transmission mechanism through the first driving gear 214.

[0046] The No. 1 transmission mechanism includes a No. 1 gear mounting shaft 208, a No. 1 mounting shaft transmission gear 209, a No. 1 upper transmission gear 210, a No. 1 transmission shaft 211 and a No. 1 lower transmission gear 212. The No. 1 transmission shaft 211 is inserted into the No. 1 connecting pipe 202 and is rotatably connected to the No. 1 connecting pipe 202 through a bearing. One end of the No. 1 transmission shaft 211 extends into the No. 1 mobile housing 201 and is fitted with the No. 1 lower transmission gear 212. The No. 1 transmission shaft 211 is transmission-connected to the No. 1 driving motor 213 through the cooperation of the No. 1 lower transmission gear 212 and the No. 1 driving gear 214. The other end of the driving shaft 211 is sleeved with the No. 1 upper transmission gear 210, the No. 1 gear installation shaft 208 is inserted into the horizontal hole in the No. 1 sliding block 203, and one end of the No. 1 gear installation shaft 208 is rotatably connected with the No. 1 sliding block 203 through a bearing, the No. 1 gear installation shaft 208 is sleeved with the No. 1 installation shaft transmission gear 209 and is transmission-connected with the No. 1 transmission shaft 211 through the cooperation of the No. 1 installation shaft transmission gear 209 and the No. 1 upper transmission gear 210, and the other end of the No. 1 gear installation shaft 208 extends outside the No. 1 sliding block 203 and is inserted into the No. 1 driving gear 205. Other components and connection methods are the same as those in the fifth embodiment.

[0047] Specific implementation method seven: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the sixth embodiment is that the first sliding block 203 is an arc block, and the first sliding block 203 is arranged in cooperation with the guide rail body 701, the first driving gear 205 is located on the inner arc surface of the first sliding block 203, and the two ends of the outer arc surface of the first sliding block 203 are respectively embedded with a first side rolling roller 207, and each of the first side rolling rollers 207 is rotatably connected to the first sliding block 203, and the bottom of the first sliding block 203 is embedded with two groups of first bottom rolling rollers 206 along the arc extension direction of the first sliding block 203, and each of the first bottom rolling rollers 206 is rotatably connected to the first sliding block 203. Other components and connection methods are the same as those of the sixth embodiment.

[0048] In combination with the description of specific embodiments six and seven, in this embodiment, the transmission gears used in the No. 1 mobile drive mechanism and the No. 1 transmission mechanism are bevel gear structures, and the torque is transmitted by the meshing of the bevel gears. The No. 1 mobile drive mechanism is used as a power source to drive the wire feeding gun rod to move and the rotating device 2 to slide along the extension direction of the guide rail body 701. The rotation drive mechanism is used as a power source to drive the rotation of the wire feeding gun rod 3. When the wire feeding gun rod moves and the rotating device 2 moves, it is achieved by the meshing and rolling of the No. 1 drive gear 205 on the rack part 703 in the guide rail body 701. In order to ensure the smoothness of the movement, the No. 1 drive gear 205 uses a bevel gear. The No. 1 sliding block 203 adopts an arc block design to better cooperate with the semi-arc guide rail to ensure its smoothness during movement. The No. 1 bottom rolling roller 206 is used to roll the bottom of the No. 1 sliding block 203 The first gear mounting shaft 208 is supported by the outer side of the first gear mounting shaft 208, thereby reducing the contact friction between the first gear mounting shaft 208 and the guide rail body 701, and ensuring the smooth movement of the first gear mounting shaft 208 in the guide rail body 701. The first side rolling roller 207 is used to replace the outer side of the first gear mounting shaft 203 in contact with the guide rail body 701, and the rigid friction of the traditional slider is converted into rolling friction. While providing good guidance for the first gear mounting shaft 203 during its movement, it can also reduce the contact friction between the first gear mounting shaft 203 and the guide rail body 701, and further improve the smoothness of movement between the first gear mounting shaft 203 and the guide rail body 701. In order to ensure the support stability of the first gear mounting shaft 208, in addition to installing a bearing at one end thereof for rotational connection with the first gear mounting shaft 203, it is also necessary to arrange a bearing between the first mounting shaft transmission gear 209 and the first drive gear 205 for auxiliary support, thereby ensuring the stability of the first gear mounting shaft 208.

[0049] Specific implementation method eight: Combination Figures 1 to 8The present embodiment is described. The difference between the present embodiment and the specific embodiment seven is that the wire feeding mechanism moving device 4 includes a No. 2 mobile driving mechanism, a No. 2 transmission mechanism, a No. 2 mobile shell 401, a No. 2 connecting pipe 402, a No. 2 sliding block 403 and a No. 2 driving gear 405. The wire feeding mechanism fixing plate 5 is arranged at the bottom of the No. 2 mobile shell 401, and the wire feeding mechanism fixing plate 5 is detachably connected to the No. 2 mobile shell 401. The No. 2 connecting pipe 402 is fixed to the top of the No. 2 mobile shell 401 in the vertical direction, and the bottom end of the No. 2 connecting pipe 402 is connected to the top of the No. 2 mobile shell 401. The No. 2 sliding block 403 is arranged at the top of the No. 2 connecting pipe 402. A horizontal hole is machined in the block 403, the No. 2 sliding block 403 and the No. 2 connecting pipe 402 are integrally formed, and the No. 2 connecting pipe 402 is connected to the horizontal hole in the No. 2 sliding block 403, the No. 2 mobile driving mechanism is installed in the No. 2 mobile housing 401, the No. 2 transmission mechanism is arranged in the cavity formed by the No. 2 connecting pipe 402 and the horizontal hole, and one end of the No. 2 transmission mechanism extends into the No. 2 mobile housing 401 and is connected to the power output end of the No. 2 mobile driving mechanism, and the other end of the No. 2 transmission mechanism extends to the outside of the No. 2 sliding block 403 and is inserted into the No. 2 driving gear 405, and the No. 2 driving gear 405 is meshed with the rack teeth in the moving guide rail 8 of the wire feeding mechanism;

[0050] The second mobile driving mechanism includes a second driving motor 413 and a second driving gear 414. The second driving motor 413 is installed in the second mobile housing 401. The second driving gear 414 is mounted on the power output shaft of the second driving motor 413. The second driving motor 413 is connected to the second transmission mechanism through the second driving gear 414.

[0051] The second transmission mechanism includes a No. 2 gear mounting shaft 408, a No. 2 mounting shaft transmission gear 409, a No. 2 upper transmission gear 410, a No. 2 transmission shaft 411 and a No. 2 lower transmission gear 412. The No. 2 transmission shaft 411 is inserted into the No. 2 connecting pipe 402 and is rotatably connected to the No. 2 connecting pipe 402 through a bearing. One end of the No. 2 transmission shaft 411 extends into the No. 2 mobile housing 401 and is fitted with the No. 2 lower transmission gear 412. The No. 2 transmission shaft 411 is transmission-connected to the No. 2 driving motor 413 through the cooperation of the No. 2 lower transmission gear 412 and the No. 2 driving gear 414. The other end of the driving shaft 411 is sleeved with a No. 2 upper transmission gear 410, the No. 2 gear mounting shaft 408 is inserted into the horizontal hole in the No. 2 sliding block 403, and one end of the No. 2 gear mounting shaft 408 is rotatably connected with the No. 2 sliding block 403 through a bearing, the No. 2 gear mounting shaft 408 is sleeved with a No. 2 mounting shaft transmission gear 409 and is transmission-connected with the No. 2 transmission shaft 411 through the cooperation of the No. 2 mounting shaft transmission gear 409 and the No. 2 upper transmission gear 410, the other end of the No. 2 gear mounting shaft 408 extends outside the No. 2 sliding block 403 and is inserted into the No. 2 driving gear 405;

[0052] The second sliding block 403 is an arc-shaped block, and the second sliding block 403 is matched with the guide rail body of the wire feeding mechanism moving guide rail 8, the second driving gear 405 is located on the inner arc surface of the second sliding block 403, and the two ends of the outer arc surface of the second sliding block 403 are respectively embedded with a second side rolling roller 407, and each second side rolling roller 407 is rotatably connected to the second sliding block 403, and the bottom of the second sliding block 403 is embedded with two groups of second bottom rolling rollers 406 along the arc extension direction of the second sliding block 403, and each second bottom rolling roller 406 is rotatably connected to the second sliding block 403. Other components and connection methods are the same as those of the specific embodiment seven.

[0053] In this embodiment, the working mode of the wire feeding mechanism moving device 4 is the same as the working mode of the wire feeding gun rod moving and rotating device 2. In terms of composition, the wire feeding mechanism moving device 4 lacks a rotation drive mechanism compared to the wire feeding gun rod moving and rotating device 2.

[0054] Specific implementation method nine: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the eighth embodiment is that the wire feeding mechanism includes a servo motor 15 and two wire feeding wheels 13. The servo motor 15 is installed on one side of the wire feeding mechanism fixing plate 5. The two wire feeding wheels 13 are symmetrically arranged at the bottom of the wire feeding mechanism fixing plate 5 along the center line of the width direction of the wire feeding mechanism fixing plate 5. Each wire feeding wheel 13 is rotatably connected to the wire feeding mechanism fixing plate 5. The metal wire is located between the two wire feeding wheels 13. The power output end of the servo motor 15 drives the two wire feeding wheels 13 to rotate toward each other through the transmission mechanism to realize the wire feeding action. Other components and connection methods are the same as those of the eighth embodiment.

[0055] The two wire feeding wheels 13 are arranged in a close relationship with each other, and a wire groove is processed on the outer surface of the wire feeding wheel 13. After the two wire feeding wheels 13 are fitted together, a wire passage is formed to facilitate the conveying of the wire. The servo motor 15 is used as a power source to drive the active wire feeding wheel to rotate. When the active wire feeding wheel rotates, the driven wire feeding wheel is driven to rotate synchronously under the action of friction to realize the conveying of the wire. In actual work, an elastic floating block is provided at the corresponding position of the fixed plate 5 of the wire feeding mechanism and the driven wire feeding wheel to facilitate the adjustment of the working distance between the driven wire feeding wheel and the active wire feeding wheel. The advantage of such a design is that on the one hand, the wire feeding mechanism can adapt to wires of different thicknesses, which is beneficial to improving the versatility of the wire feeding mechanism, and on the other hand, it is also more convenient for the installation of the wire.

[0056] Specific implementation method ten: Combination Figures 1 to 8 This embodiment is described. The difference between this embodiment and the ninth embodiment is that the wire feeding mechanism further includes two wire guide tubes 6, one wire guide tube 6 is arranged between the wire reel box 12 and the two wire feeding wheels 13, and one end of the wire guide tube 6 is connected to the wire outlet end of the wire reel box 12, and the other end of the wire guide tube 6 is fixedly connected to the bottom of the wire feeding mechanism fixing plate 5, and the other wire guide tube 6 is arranged between the two wire feeding wheels 13 and the wire feeding gun rod 3, and one end of the wire guide tube 6 is fixedly connected to the bottom of the wire feeding mechanism fixing plate 5, and the other end of the wire guide tube 6 is connected to the wire inlet end of the wire feeding gun rod 3. Other components and connection methods are the same as those of the ninth embodiment.

[0057] In this embodiment, the wire guide tube 6 is a flexible bellows structure, which is used to protect the metal wire to prevent it from being entangled on the supporting structure inside the vacuum chamber during movement. It plays a good wire guiding role, is beneficial to protecting the metal wire and improving the stability of the metal wire transportation process.

[0058] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0059] How it works

[0060] The specific operations of this application when used are as follows:

[0061] Step 1: Preparation before electron beam fuse additive: fix the substrate 9 to the work platform 10, assemble the wire feeding gun rod 3 and the wire feeding gun rod moving and rotating device 2 to the gun rod moving guide rail 7, and assemble the wire feeding mechanism 5 and the wire feeding mechanism moving device 4 to the wire feeding mechanism moving guide rail 8, put the metal wire reel into the wire reel box 12, pass the metal wire through the wire feeding mechanism 5 and the wire guide tube 6 and connect it to the wire feeding end of the wire feeding gun rod 3;

[0062] Step 2: adjust the working angle of the wire feeding gun rod 3 by the wire feeding gun rod moving and rotating device 2, and adjust the working angle of the wire feeding mechanism 5 by the wire feeding mechanism moving device 4. After ensuring that the movement of the wire feeding gun rod 3 and the wire feeding mechanism 5 and the wire feeding smoothness meet the working requirements, evacuate the vacuum chamber 11 to establish a vacuum working environment;

[0063] Step 3: After the vacuum working environment is established, the electron beam fuse additive work is carried out. During the electron beam fuse additive process, the electron gun 1 is fixed, and the electron beam excited by the electron gun 1 reaches the substrate 9 through the electron beam lower beam hole 14. The substrate 9 moves along with the workbench 10 according to the preset program path, and the electron beam scans. Under the control of the servo motor 15, the two wire feeding wheels 13 rotate in opposite directions to transport the metal wire, and the wire feeding gun rod 3 is used to transport the metal wire into the molten pool formed by the electron beam to achieve the purpose of wire injection;

[0064] Step 4: Repeat step 3 until the printing sample is completed.

[0065] The wire feeding gun rod 3, the wire feeding gun rod moving and rotating device 2 and the wire feeding wheel 13, the wire feeding mechanism fixing plate 5, the servo motor 15, the wire feeding mechanism moving device 4, the wire guide tube 6 and other wire feeding systems and moving parts of the step 1 can be increased or decreased according to the needs of the actual printing work;

[0066] During the movement process of step 2, the wire feeding gun rod moving and rotating device 2 and the wire feeding mechanism moving device 4 move synchronously to ensure continuous feeding of the metal wire.

Claims

1. A wire feeding device in a vacuum chamber for electron beam fused wire additive manufacturing, characterized in that: The wire feeding device is arranged in a vacuum chamber (11), and comprises a wire feeding gun rod moving and rotating device (2), a wire feeding gun rod (3), a wire feeding mechanism moving device (4), a wire feeding gun rod moving guide rail (7), a wire feeding mechanism moving guide rail (8), a wire reel box (12) and a wire feeding mechanism; the wire feeding gun rod moving guide rail (7) and the wire feeding mechanism moving guide rail (8) are both arranged at the inner top of the vacuum chamber (11) and fixedly connected to the vacuum chamber (11); the wire feeding gun rod moving and rotating device (2) is arranged on the wire feeding gun rod moving guide rail (7) and can be moved along the extension direction of the wire feeding gun rod moving guide rail (7). The wire feeding gun rod (3) is mounted on the wire feeding gun rod moving and rotating device (2); the wire feeding mechanism moving device (4) is arranged on the wire feeding mechanism moving guide rail (8) and can reciprocate along the extension direction of the wire feeding mechanism moving guide rail (8); the wire feeding mechanism is mounted on the wire feeding mechanism moving device (4); a wire reel box (12) is mounted on the inner wall of the vacuum chamber (11); a wire winding shaft is inserted into the wire reel box (12), and the wire winding shaft is rotatably connected to the wire reel box (12); a metal wire is wound around the wire winding shaft, and one end of the metal wire is connected to the wire feeding gun rod (3) through the wire feeding mechanism.

2. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 1, characterized in that: An electron beam lower beam hole (14) is machined at the center of the inner top of the vacuum chamber (11), an electron gun (1) is mounted on the outer top of the vacuum chamber (11), and the beam end of the electron gun (1) is arranged corresponding to the electron beam lower beam hole (14).

3. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 1, characterized in that: A working platform (10) is provided on the inner bottom of the vacuum chamber (11), the working platform (10) is a six-degree-of-freedom working table, and a substrate (9) is installed on the top of the working platform (10), and the substrate (9) is used to carry a printed workpiece.

4. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 3, characterized in that: The wire feeding gun rod movable guide rail (7) and the wire feeding mechanism movable guide rail (8) are both semi-arc guide rails, and the diameter of the circular arc where the wire feeding mechanism movable guide rail (8) is located is larger than the diameter of the circular arc where the wire feeding gun rod movable guide rail (7) is located. The wire feeding mechanism movable guide rail (8) and the wire feeding gun rod movable guide rail (7) are sequentially sleeved on the outer side of the electron beam lower beam hole (14), and the wire feeding mechanism movable guide rail (8), the wire feeding gun rod movable guide rail (7) and the electron beam lower beam hole (14) are concentrically arranged.

5. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 4, characterized in that: The wire feeding gun rod movable guide rail (7) comprises a guide rail body (701) and two end covers (702), the two end covers (702) are respectively arranged at two ends of the guide rail body (701) and are detachably connected to the guide rail body (701), a guide rack (703) is arranged on the inner wall of one side of the guide groove in the guide rail body (701), and the wire feeding mechanism movable guide rail (8) and the wire feeding gun rod movable guide rail (7) have the same composition structure.

6. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 5, characterized in that: The wire feeding gun rod moving and rotating device (2) comprises a rotation driving mechanism, a No. 1 moving driving mechanism, a No. 1 transmission mechanism, a No. 1 moving housing (201), a No. 1 connecting pipe (202), a No. 1 sliding block (203), a mounting support plate (204) and a No. 1 driving gear (205), wherein the mounting support plate (204) is arranged at the bottom of the No. 1 moving housing (201), and the mounting support plate (204) is detachably connected to the No. 1 moving housing (201), the No. 1 connecting pipe (202) is fixed to the top of the No. 1 moving housing (201) in a vertical direction, and the bottom end of the No. 1 connecting pipe (202) is connected to the top of the No. 1 moving housing (201), the No. 1 sliding block (203) is arranged at the top of the No. 1 connecting pipe (202), a horizontal hole is machined in the No. 1 sliding block (203), and the No. 1 sliding block (203) and the No. 1 connecting pipe (202) are connected to each other. The first connecting tube (202) is connected to the horizontal hole in the first sliding block (203), the rotation drive mechanism and the first movable drive mechanism are both installed in the first movable housing (201), the top end of the wire feeding gun rod (3) passes through the mounting support plate (204) and extends into the first movable housing (201), and the top end of the wire feeding gun rod (3) is transmission-connected with the power output end of the rotation drive mechanism, the first transmission mechanism is arranged in the cavity formed by the first connecting tube (202) and the horizontal hole, and one end of the first transmission mechanism extends into the first movable housing (201) and is transmission-connected with the power output end of the first movable drive mechanism, and the other end of the first transmission mechanism extends to the outside of the first sliding block (203) and is inserted into the first driving gear (205), and the first driving gear (205) is meshed with the guide rack (703); The upper part of the wire feeding gun rod (3) is rotatably connected to the mounting support plate (204) via a rotating bearing (218); The rotary drive mechanism comprises a rotary motor (215), a rotary driving gear (216) and a rotary driven gear (217), wherein the rotary motor (215) is installed in a first movable housing (201), the rotary driving gear (216) is sleeved on a power output shaft of the rotary motor (215), the rotary driven gear (217) is sleeved on the top end of the wire feeding gun rod (3), and the rotary driving gear (216) is transmission-connected with the rotary driven gear (217); The first mobile driving mechanism comprises a first driving motor (213) and a first driving gear (214), wherein the first driving motor (213) is installed in the first mobile housing (201), the first driving gear (214) is sleeved on the power output shaft of the first driving motor (213), and the first driving motor (213) is connected to the first transmission mechanism through the first driving gear (214); The first transmission mechanism comprises a first gear mounting shaft (208), a first mounting shaft transmission gear (209), a first upper transmission gear (210), a first transmission shaft (211) and a first lower transmission gear (212); the first transmission shaft (211) is inserted into a first connecting pipe (202) and is rotatably connected to the first connecting pipe (202) through a bearing; one end of the first transmission shaft (211) extends into a first movable housing (201) and is fitted with a first lower transmission gear (212); the first transmission shaft (211) is transmission-connected to a first driving motor (213) through the cooperation of the first lower transmission gear (212) and a first driving gear (214); The other end of the transmission shaft (211) is sleeved with a No. 1 upper transmission gear (210), the No. 1 gear installation shaft (208) is inserted into a horizontal hole in the No. 1 sliding block (203), and one end of the No. 1 gear installation shaft (208) is rotatably connected to the No. 1 sliding block (203) through a bearing, the No. 1 gear installation shaft (208) is sleeved with a No. 1 installation shaft transmission gear (209) and is transmission-connected to the No. 1 transmission shaft (211) through the cooperation of the No. 1 installation shaft transmission gear (209) and the No. 1 upper transmission gear (210), and the other end of the No. 1 gear installation shaft (208) extends outside the No. 1 sliding block (203) and is inserted into the No. 1 driving gear (205).

7. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 6, characterized in that: The No. 1 sliding block (203) is an arc-shaped block, and the No. 1 sliding block (203) is arranged in cooperation with the guide rail body (701), the No. 1 driving gear (205) is located on the inner arc surface of the No. 1 sliding block (203), and the two ends of the outer arc surface of the No. 1 sliding block (203) are respectively embedded with a No. 1 side rolling roller (207), and each No. 1 side rolling roller (207) is rotatably connected to the No. 1 sliding block (203), and the bottom of the No. 1 sliding block (203) is embedded with two groups of No. 1 bottom rolling rollers (206) along the arc extension direction of the No. 1 sliding block (203), and each No. 1 bottom rolling roller (206) is rotatably connected to the No. 1 sliding block (203).

8. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 7, characterized in that: The wire feeding mechanism moving device (4) comprises a No. 2 moving driving mechanism, a No. 2 transmission mechanism, a No. 2 moving housing (401), a No. 2 connecting pipe (402), a No. 2 sliding block (403) and a No. 2 driving gear (405); a wire feeding mechanism fixing plate (5) is arranged at the bottom of the No. 2 moving housing (401), and the wire feeding mechanism fixing plate (5) is detachably connected to the No. 2 moving housing (401); the No. 2 connecting pipe (402) is fixed to the top of the No. 2 moving housing (401) in a vertical direction, and the bottom end of the No. 2 connecting pipe (402) is connected to the top of the No. 2 moving housing (401); the No. 2 sliding block (403) is arranged at the top of the No. 2 connecting pipe (402), and a water-tight seal is machined inside the No. 2 sliding block (403). The second sliding block (403) and the second connecting pipe (402) are integrally formed, and the second connecting pipe (402) is connected to the horizontal hole in the second sliding block (403), the second mobile driving mechanism is installed in the second mobile housing (401), the second transmission mechanism is arranged in the cavity formed by the second connecting pipe (402) and the horizontal hole, and one end of the second transmission mechanism extends into the second mobile housing (401) and is connected to the power output end of the second mobile driving mechanism, and the other end of the second transmission mechanism extends to the outside of the second sliding block (403) and is inserted into the second driving gear (405), and the second driving gear (405) is meshed with the rack part in the moving guide rail (8) of the wire feeding mechanism; The second mobile driving mechanism comprises a second driving motor (413) and a second driving gear (414), wherein the second driving motor (413) is installed in the second mobile housing (401), the second driving gear (414) is sleeved on the power output shaft of the second driving motor (413), and the second driving motor (413) is connected to the second transmission mechanism through the second driving gear (414); The second transmission mechanism comprises a second gear mounting shaft (408), a second mounting shaft transmission gear (409), a second upper transmission gear (410), a second transmission shaft (411) and a second lower transmission gear (412). The second transmission shaft (411) is inserted into the second connecting pipe (402) and is rotatably connected to the second connecting pipe (402) through a bearing. One end of the second transmission shaft (411) extends into the second movable housing (401) and is sleeved with the second lower transmission gear (412). The second transmission shaft (411) is transmission-connected to the second driving motor (413) through the cooperation of the second lower transmission gear (412) and the second driving gear (414). The other end of the transmission shaft (411) is sleeved with a No. 2 upper transmission gear (410), the No. 2 gear installation shaft (408) is inserted into the horizontal hole in the No. 2 sliding block (403), and one end of the No. 2 gear installation shaft (408) is rotatably connected to the No. 2 sliding block (403) through a bearing, the No. 2 gear installation shaft (408) is sleeved with a No. 2 installation shaft transmission gear (409) and is transmission-connected to the No. 2 transmission shaft (411) through the cooperation of the No. 2 installation shaft transmission gear (409) and the No. 2 upper transmission gear (410), and the other end of the No. 2 gear installation shaft (408) extends outside the No. 2 sliding block (403) and is inserted into the No. 2 driving gear (405); The No. 2 sliding block (403) is an arc-shaped block, and the No. 2 sliding block (403) is arranged in cooperation with the guide rail body of the wire feeding mechanism moving guide rail (8), the No. 2 driving gear (405) is located on the inner arc surface of the No. 2 sliding block (403), and two ends of the outer arc surface of the No. 2 sliding block (403) are respectively embedded with a No. 2 side rolling roller (407), and each No. 2 side rolling roller (407) is rotatably connected to the No. 2 sliding block (403), and the bottom of the No. 2 sliding block (403) is embedded with two groups of No. 2 bottom rolling rollers (406) along the arc extension direction of the No. 2 sliding block (403), and each No. 2 bottom rolling roller (406) is rotatably connected to the No. 2 sliding block (403).

9. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 8, characterized in that: The wire feeding mechanism comprises a servo motor (15) and two wire feeding wheels (13), wherein the servo motor (15) is mounted on one side of a wire feeding mechanism fixing plate (5), and the two wire feeding wheels (13) are symmetrically arranged at the bottom of the wire feeding mechanism fixing plate (5) along the center line of the wire feeding mechanism fixing plate (5) in the width direction, and each wire feeding wheel (13) is rotatably connected to the wire feeding mechanism fixing plate (5), and a metal wire is located between the two wire feeding wheels (13). The power output end of the servo motor (15) drives the two wire feeding wheels (13) to rotate towards each other through a transmission mechanism to realize a wire feeding action.

10. A wire feeding device built into a vacuum chamber for electron beam fuse additive manufacturing according to claim 9, characterized in that: The wire feeding mechanism further comprises two wire guide tubes (6), one wire guide tube (6) being arranged between the wire reel box (12) and the two wire feeding wheels (13), one end of the wire guide tube (6) being connected to the wire outlet end of the wire reel box (12), the other end of the wire guide tube (6) being fixedly connected to the bottom of the wire feeding mechanism fixing plate (5), the other wire guide tube (6) being arranged between the two wire feeding wheels (13) and the wire feeding gun rod (3), one end of the wire guide tube (6) being fixedly connected to the bottom of the wire feeding mechanism fixing plate (5), the other end of the wire guide tube (6) being connected to the wire inlet end of the wire feeding gun rod (3).

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