A dual precision movement control mechanism for a laser additive manufacturing powder delivery head

Abstract

This invention provides a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing. It includes a base assembly, X-axis movement components, Y-axis movement components, Z-axis movement components, a powder feeding head assembly, and an indicator component. The X-axis, Y-axis, and Z-axis movement components all use a combination of lead screws and cylindrical cams to control the position of the powder feeding head assembly, enabling rapid movement of the powder feeding head along the X, Y, and Z axes. A fine-tuning device allows for precise control of the powder feeding head position. The indicator component displays the real-time position of the powder feeding head, facilitating adjustment. This invention features a novel structure, ease of manufacture, and flexible operation, enabling rapid and precise adjustment of the powder feeding head position, thus improving the quality and efficiency of laser powder feeding additive manufacturing.

Description

Technical Field

[0001] This invention relates to a motion control mechanism for a powder feeding head in laser additive manufacturing. It is suitable for the motion control of the powder feeding head in laser additive manufacturing and can quickly and accurately adjust the position of the powder feeding head. Background Technology

[0002] In laser powder feeding additive manufacturing, the adjustment and control of the powder feeding head position has a significant impact on the efficiency and quality of additive manufacturing. In previous laser powder feeding additive manufacturing equipment, the powder feeding head position was often controlled by a motor-driven lead screw, worm gear, or gear mechanism. The movement speed and positional accuracy of the powder feeding head were primarily determined by a single mechanical structure, making it difficult to achieve high-speed and high-precision movement of the powder feeding head during additive manufacturing. This severely limited the efficiency of the additive manufacturing process and the improvement of the quality of the additive manufactured components. This invention innovatively combines a lead screw with a cylindrical cam and uses a fine-tuning device to achieve rapid and precise movement of the laser powder feeding head, thereby improving the efficiency and quality of laser powder feeding additive manufacturing. Summary of the Invention

[0003] This invention provides a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing. Its purpose is to achieve rapid and precise movement control of the powder feeding head during the laser additive manufacturing process, thereby improving the efficiency and quality of laser powder feeding additive manufacturing.

[0004] To achieve the above objectives, the present invention provides a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing, comprising:

[0005] A base assembly includes a base, on which are provided an X-direction left support, an X-direction right support, an X-direction rear upright plate, and an X-direction front upright plate. The X-direction left support has a dovetail groove that connects to the dovetail structure on the left side of the Y-direction support, and the X-direction right support has a dovetail groove that connects to the dovetail structure on the right side of the Y-direction support. A Y-direction base plate is fixed on the Y-direction support, and a Y-direction left upright plate is fixed on the left side of the Y-direction base plate and a Y-direction right upright plate is fixed on the right side of the Y-direction base plate. The base assembly also includes a Z-direction base plate, with a Z-direction upward upright plate fixed on the upper side of the Z-direction base plate and a Z-direction downward upright plate fixed on the lower side of the Z-direction base plate.

[0006] The X-direction moving assembly includes an X-direction main drive motor connected to an X-direction main lead screw. The X-direction main lead screw passes through an X-direction front upright plate, an X-direction fine-tuning plate, and an X-direction fine-tuning gear cover. The X-direction main lead screw engages with the internal thread of an X-direction front large gear via an external thread. The X-direction front large gear meshes with an X-direction front small gear, which is fixed to an X-direction hollow rod. The front end of the X-direction hollow rod passes through the X-direction front upright plate, the X-direction fine-tuning plate, and the X-direction fine-tuning gear cover. The rear end of the X-direction hollow rod engages with the external spline of the front end of an X-direction gear transmission rod via an internal spline. The rear end of the rod passes through the rear vertical plate in the X direction. A small rear gear in the X direction is fixed on the gear transmission rod in the X direction. The small rear gear in the X direction meshes with a large rear gear in the X direction. The large rear gear in the X direction is fixed on the cylindrical cam transmission rod in the X direction. The rear end of the cylindrical cam transmission rod in the X direction passes through the rear vertical plate in the X direction. The front end of the cylindrical cam transmission rod in the X direction is engaged with the internal spline of the cylindrical cam in the X direction through an external spline. The front end face of the cylindrical cam in the X direction is in close contact with the rear end face of the main lead screw in the X direction. A spiral groove is provided on the surface of the cylindrical cam in the X direction. An X-direction output rod is provided in the spiral groove on the surface of the cylindrical cam in the X direction. The X-direction output rod passes through the blind hole on the right end face of the Y-direction support.

[0007] The Y-direction moving assembly includes a Y-direction main drive motor connected to a Y-direction main lead screw. The Y-direction main lead screw passes through a Y-direction right vertical plate, a Y-direction fine-tuning plate, and a Y-direction fine-tuning gear cover. The Y-direction main lead screw engages with the internal thread of a Y-direction right large gear via an external thread. The Y-direction right large gear meshes with a Y-direction right small gear. The Y-direction right small gear is fixed to a Y-direction hollow rod. The right end of the Y-direction hollow rod passes through the Y-direction right vertical plate, the Y-direction fine-tuning plate, and the Y-direction fine-tuning gear cover. The left end of the Y-direction hollow rod engages with the external spline of the right end of a Y-direction gear transmission rod via an internal spline. The left end of the Y-direction gear transmission rod passes through the Y-direction left vertical plate. A Y-direction left small gear is fixed to the Y-direction gear transmission rod. The Y-direction left small gear meshes with the Y-direction... The large left gear meshes with the Y-direction gear, which is fixed on the Y-direction cylindrical cam transmission rod. The left end of the Y-direction cylindrical cam transmission rod passes through the left vertical plate in the Y-direction. The right end of the Y-direction cylindrical cam transmission rod engages with the internal spline of the Y-direction cylindrical cam via an external spline. The right end face of the Y-direction cylindrical cam is in close contact with the left end face of the Y-direction main lead screw. The surface of the Y-direction cylindrical cam is provided with a spiral groove. A Y-direction output rod is provided in the spiral groove on the surface of the Y-direction cylindrical cam. The Y-direction output rod passes through the guide groove in the middle of the Y-direction guide rod and enters the blind hole on the rear end face of the Z-direction base plate. The Y-direction guide rod is fixed between the left vertical plate and the right vertical plate in the Y-direction, and the left end face of the Y-direction guide rod is in close contact with the right end face of the left vertical plate in the Y-direction, and the right end face of the Y-direction guide rod is in close contact with the left end face of the right vertical plate in the Y-direction.

[0008] The Z-direction moving assembly includes a Z-direction main drive motor connected to a Z-direction main lead screw. The Z-direction main lead screw passes through a Z-direction upper plate, a Z-direction fine-tuning plate, and a Z-direction fine-tuning gear cover. The Z-direction main lead screw engages with the internal thread of a large Z-direction gear via an external thread. The large Z-direction gear meshes with a small Z-direction gear, which is fixed to a hollow Z-direction rod. The upper end of the hollow Z-direction rod passes through the Z-direction upper plate, the Z-direction fine-tuning plate, and the Z-direction fine-tuning gear cover. The lower end of the hollow Z-direction rod engages with the external spline of the upper end of a Z-direction gear transmission rod via an internal spline. The lower end of the Z-direction gear transmission rod passes through the lower Z-direction upper plate, and a lower Z-direction small gear is fixed to the Z-direction gear transmission rod. A downward pinion meshes with a downward large gear in the Z direction. The downward large gear in the Z direction is fixed on a cylindrical cam transmission rod in the Z direction. The lower end of the cylindrical cam transmission rod in the Z direction passes through the lower vertical plate in the Z direction. The upper end of the cylindrical cam transmission rod in the Z direction is engaged with the internal spline of the cylindrical cam in the Z direction via an external spline. The upper end face of the cylindrical cam in the Z direction is in close contact with the lower end face of the main lead screw in the Z direction. A helical groove is provided on the surface of the cylindrical cam in the Z direction. A Z-direction output rod is provided in the helical groove on the surface of the cylindrical cam in the Z direction. The Z-direction output rod passes through the guide groove in the middle of the Z-direction guide rod. The Z-direction guide rod is fixed between the upper vertical plate in the Z direction and the lower vertical plate in the Z direction. The upper end face of the Z-direction guide rod is in close contact with the lower end face of the upper vertical plate in the Z direction, and the lower end face of the Z-direction guide rod is in close contact with the upper end face of the lower vertical plate in the Z direction.

[0009] A powder feeding head assembly, comprising a powder feeding head, a blind hole provided on the back of the powder feeding head, and the powder feeding head being connected to a Z-direction output rod through the blind hole;

[0010] The indicator component includes an X-direction pointer, a Y-direction pointer, a Z-direction pointer, an X-direction scale, a Y-direction scale, and a Z-direction scale.

[0011] The front end face of the X-direction cylindrical cam is connected to the right and left semicircular boxes in the X-direction direction by bolts. The right and left semicircular boxes in the X-direction direction have identical structures and are symmetrically arranged to form a complete circular box. The X-direction main lead screw passes through the through hole in the middle of the right and left semicircular boxes in the X-direction direction. The inner wall surfaces of the right and left semicircular boxes in the X-direction direction are in close contact with the outer end face of the rear end boss of the X-direction main lead screw. The rear end of the X-direction main lead screw is provided with a blind hole larger than the major diameter of the spline of the X-direction cylindrical cam drive rod.

[0012] The X-direction moving component includes an X-direction fine-tuning drive motor, which is connected to an X-direction fine-tuning screw. The X-direction fine-tuning screw passes through the X-direction fine-tuning plate and the X-direction front upright plate. The X-direction fine-tuning plate is bolted to the X-direction fine-tuning gear cover. The inner wall of the X-direction fine-tuning gear cover is in close contact with the rear end faces of the X-direction front large gear and the X-direction front small gear.

[0013] The right end face of the Y-direction cylindrical cam is connected to the rear and front semicircular boxes in the Y-direction direction by bolts. The rear and front semicircular boxes in the Y-direction direction have identical structures and are symmetrically arranged to form a complete circular box. The Y-direction main lead screw passes through the through hole in the middle of the rear and front semicircular boxes in the Y-direction direction. The inner wall surfaces of the rear and front semicircular boxes in the Y-direction direction are in close contact with the outer end face of the left end boss of the Y-direction main lead screw. The left end of the Y-direction main lead screw is provided with a blind hole larger than the major diameter of the spline of the Y-direction cylindrical cam drive rod.

[0014] The Y-direction moving component includes a Y-direction fine-tuning drive motor, which is connected to a Y-direction fine-tuning lead screw. The Y-direction fine-tuning lead screw passes through the Y-direction fine-tuning plate and the Y-direction right vertical plate. The Y-direction fine-tuning plate is connected to the Y-direction fine-tuning gear cover by bolts. The inner wall of the Y-direction fine-tuning gear cover is in close contact with the left end face of the Y-direction right large gear and the Y-direction right small gear.

[0015] The upper end face of the Z-direction cylindrical cam is connected to the left and right semicircular boxes in the Z-direction direction by bolts. The left and right semicircular boxes in the Z-direction direction have identical structures and are symmetrically arranged to form a complete circular box. The Z-direction main lead screw passes through the through hole in the middle of the left and right semicircular boxes in the Z-direction direction. The inner wall surfaces of the left and right semicircular boxes in the Z-direction direction are in close contact with the outer end face of the lower boss of the Z-direction main lead screw. The lower end of the Z-direction main lead screw is provided with a blind hole larger than the major diameter of the spline of the Z-direction cylindrical cam drive rod.

[0016] The Z-direction moving component includes a Z-direction fine-tuning drive motor, which is connected to a Z-direction fine-tuning lead screw. The Z-direction fine-tuning lead screw passes through the Z-direction fine-tuning plate and the Z-direction upright plate. The Z-direction fine-tuning plate is bolted to the Z-direction fine-tuning gear cover. The inner wall of the Z-direction fine-tuning gear cover is in close contact with the lower end faces of the large gear and the small gear in the Z-direction direction.

[0017] The X-direction right support base has an X-direction scale on its right end face and an X-direction pointer on its X-direction output rod. The Y-direction base plate has a Y-direction scale on its front end face and a Y-direction pointer on its Y-direction output rod. The Z-direction base plate has a Z-direction scale on its front end face and a Z-direction pointer on its Z-direction output rod.

[0018] The above-described solution of the present invention has the following beneficial effects:

[0019] This invention provides a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing. It includes a base assembly, X-axis movement components, Y-axis movement components, Z-axis movement components, a powder feeding head assembly, and an indicator component. The X-axis, Y-axis, and Z-axis movement components all use a combination of lead screws and cylindrical cams to control the position of the powder feeding head assembly, enabling rapid movement of the powder feeding head along the X, Y, and Z axes. A fine-tuning device allows for precise control of the powder feeding head position. The indicator component displays the real-time position of the powder feeding head, facilitating adjustment. This invention features a novel structure, ease of manufacture, and flexible operation, enabling rapid and precise adjustment of the powder feeding head position, thereby improving the quality and efficiency of laser powder feeding additive manufacturing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the base assembly structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the X-direction moving component structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the Y-direction moving component structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the Z-direction moving component structure of the present invention.

[0025] [Explanation of Labels in the Attached Image]

[0026] 1-Base assembly; 101-Base; 102-Left support seat in X direction; 103-Right support seat in X direction; 104-Rear upright plate in X direction; 105-Front upright plate in X direction; 106-Support seat in Y direction; 107-Base plate in Y direction; 108-Left upright plate in Y direction; 109-Right upright plate in Y direction; 110-Base plate in Z direction; 111-Upward upright plate in Z direction; 112-Lower upright plate in Z direction; 2-X-direction moving assembly; 201-Main drive motor in X direction; 202-Main lead screw in X direction; 203-Fine adjustment plate in X direction; 204-Fine adjustment gear cover in X direction; 205-Front large gear in X direction; 206-Front small gear in X direction; 207-X-direction... Hollow rod; 208-X-direction gear transmission rod; 209-X-direction rear pinion; 210-X-direction rear large gear; 211-X-direction cylindrical cam transmission rod; 212-X-direction cylindrical cam; 213-X-direction output rod; 214-X-direction right semi-circular box; 215-X-direction left semi-circular box; 216-X-direction fine-tuning drive motor; 217-X-direction fine-tuning screw; 3-Y-direction moving assembly; 301-Y-direction main drive motor; 302-Y-direction main screw; 303-Y-direction fine-tuning plate; 304-Y-direction fine-tuning gear cover; 305-Y-direction right large gear; 306-Y-direction right small gear; 307-Y-direction hollow rod; 3 08-Y-direction gear drive rod; 309-Y-direction left pinion; 310-Y-direction left large gear; 311-Y-direction cylindrical cam drive rod; 312-Y-direction cylindrical cam; 313-Y-direction output rod; 314-Y-direction guide rod; 315-Y-direction rear semi-circular box; 316-Y-direction front semi-circular box; 317-Y-direction fine-tuning drive motor; 318-Y-direction fine-tuning screw; 4-Z-direction moving assembly; 401-Z-direction main drive motor; 402-Z-direction main screw; 403-Z-direction fine-tuning plate; 404-Z-direction fine-tuning gear cover; 405-Z-direction large gear; 406-Z-direction small gear; 407-Z-direction... Hollow rod; 408-Z-direction gear transmission rod; 409-Z-direction lower pinion; 410-Z-direction lower large pinion; 411-Z-direction cylindrical cam transmission rod; 412-Z-direction cylindrical cam; 413-Z-direction output rod; 414-Z-direction guide rod; 415-Z-direction left semicircular box; 416-Z-direction right semicircular box; 417-Z-direction fine-tuning drive motor; 418-Z-direction fine-tuning screw; 5-Powder feeding head assembly; 501-Powder feeding head; 6-Indicator assembly; 601-X-direction pointer; 602-Y-direction pointer; 603-Z-direction pointer; 604-X-direction scale; 605-Y-direction scale; 606-Z-direction scale. Detailed Implementation

[0027] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0028] This invention addresses the problem that the powder feeding head in laser additive manufacturing is difficult to move at high speed and with high precision, which severely restricts the efficiency of the additive manufacturing process and the improvement of the quality of additive manufactured structural parts. It provides a dual-precision movement control mechanism for the powder feeding head in laser additive manufacturing.

[0029] like Figures 1 to 5 As shown, an embodiment of the present invention provides a double-precision movement control mechanism for a powder feeding head in laser additive manufacturing, comprising:

[0030] The base assembly 1 includes a base 101, on which are provided an X-direction left support 102, an X-direction right support 103, an X-direction rear upright plate 104, and an X-direction front upright plate 105. The X-direction left support 102 is provided with a dovetail groove that connects to the dovetail structure on the left side of the Y-direction support 106. The X-direction right support 103 is provided with a dovetail groove that connects to the dovetail structure on the right side of the Y-direction support 106. A Y-direction base plate 107 is fixed on the Y-direction support 106. A Y-direction left upright plate 108 is fixed on the left side of the Y-direction base plate 107, and a Y-direction right upright plate 109 is fixed on the right side of the Y-direction base plate 107. The base assembly 1 also includes a Z-direction base plate 110. A Z-direction upper upright plate 111 is fixed on the upper side of the Z-direction base plate 110, and a Z-direction lower upright plate 112 is fixed on the lower side of the Z-direction base plate 110.

[0031] X-direction moving assembly 2 includes an X-direction main drive motor 201 connected to an X-direction main lead screw 202. The X-direction main lead screw 202 passes through an X-direction front upright plate 105, an X-direction fine-tuning plate 203, and an X-direction fine-tuning gear cover 204. The X-direction main lead screw 202 engages with the internal thread of an X-direction front large gear 205 via an external thread. The X-direction front large gear 205 meshes with an X-direction front small gear 206, which is fixed to an X-direction hollow rod 207. The front end of the X-direction hollow rod 207 passes through the X-direction front upright plate 105, the X-direction fine-tuning plate 203, and the X-direction fine-tuning gear cover 204. The rear end of the X-direction hollow rod 207 engages with the front end of an X-direction gear transmission rod 208 via an internal spline. The rear end of the moving rod 208 passes through the rear vertical plate 104 in the X direction. An X-direction rear pinion 209 is fixed on the X-direction gear transmission rod 208. The X-direction rear pinion 209 meshes with the X-direction rear large gear 210. The X-direction rear large gear 210 is fixed on the X-direction cylindrical cam transmission rod 211. The rear end of the X-direction cylindrical cam transmission rod 211 passes through the rear vertical plate 104 in the X direction. The front end of the X-direction cylindrical cam transmission rod 211 is engaged with the internal spline of the X-direction cylindrical cam 212 through an external spline. The front end face of the X-direction cylindrical cam 212 is in close contact with the rear end face of the X-direction main lead screw 202. A spiral groove is provided on the surface of the X-direction cylindrical cam 212. An X-direction output rod 213 is provided in the spiral groove on the surface of the X-direction cylindrical cam 212. The X-direction output rod 213 passes through the blind hole on the right end face of the Y-direction support seat 106.

[0032] The Y-direction moving component 3 includes a Y-direction main drive motor 301, which is connected to a Y-direction main lead screw 302. The Y-direction main lead screw 302 passes through the Y-direction right vertical plate 109, the Y-direction fine-tuning plate 303, and the Y-direction fine-tuning gear cover 304. The Y-direction main lead screw 302 engages with the internal thread of the Y-direction right large gear 305 via an external thread. The Y-direction right large gear 305 meshes with the Y-direction right small gear 306. 306 is fixed on the hollow rod 307 in the Y direction. The right end of the hollow rod 307 passes through the right vertical plate 109 in the Y direction, the fine-tuning plate 303 in the Y direction, and the fine-tuning gear cover 304 in the Y direction. The left end of the hollow rod 307 in the Y direction is engaged with the external spline on the right end of the gear transmission rod 308 in the Y direction via an internal spline. The left end of the gear transmission rod 308 in the Y direction passes through the left vertical plate 108 in the Y direction. A left pinion 309 in the Y direction is fixed on the gear transmission rod 308 in the Y direction. 9 meshes with the Y-direction left large gear 310, which is fixed on the Y-direction cylindrical cam transmission rod 311. The left end of the Y-direction cylindrical cam transmission rod 311 passes through the Y-direction left vertical plate 108, and the right end of the Y-direction cylindrical cam transmission rod 311 engages with the Y-direction cylindrical cam 312 via an external spline. The right end face of the Y-direction cylindrical cam 312 is in close contact with the left end face of the Y-direction main lead screw 302. The surface of the Y-direction cylindrical cam 312 is provided with a helical groove. A Y-direction output rod 313 is provided in the spiral groove on the surface of the cam 312. The Y-direction output rod 313 passes through the guide groove in the middle of the Y-direction guide rod 314 and enters the blind hole on the rear end face of the Z-direction base plate 110. The Y-direction guide rod 314 is fixed between the Y-direction left vertical plate 108 and the Y-direction right vertical plate 109, and the left end face of the Y-direction guide rod 314 is in close contact with the right end face of the Y-direction left vertical plate 108, and the right end face of the Y-direction guide rod 314 is in close contact with the left end face of the Y-direction right vertical plate 109.

[0033] Z-direction moving assembly 4 includes a Z-direction main drive motor 401 connected to a Z-direction main lead screw 402. The Z-direction main lead screw 402 passes through a Z-direction upright plate 111, a Z-direction fine-tuning plate 403, and a Z-direction fine-tuning gear cover 404. The Z-direction main lead screw 402 engages with a large Z-direction gear 405 via an external thread. The large Z-direction gear 405 meshes with a small Z-direction gear 406. An upward pinion 406 is fixed to a hollow rod 407 in the Z direction. The upper end of the hollow rod 407 passes through the upward vertical plate 111, the Z-direction fine-tuning plate 403, and the Z-direction fine-tuning gear cover 404. The lower end of the hollow rod 407 engages with the upper external spline of the Z-direction gear transmission rod 408 via an internal spline. The lower end of the Z-direction gear transmission rod 408 passes through the lower vertical plate 112 in the Z direction. A downward pinion 409 in the Z direction is fixed to the Z-direction gear transmission rod 408. The Z-direction lower pinion 409 meshes with the Z-direction lower gear 410. The Z-direction lower gear 410 is fixed on the Z-direction cylindrical cam transmission rod 411. The lower end of the Z-direction cylindrical cam transmission rod 411 passes through the Z-direction lower vertical plate 112. The upper end of the Z-direction cylindrical cam transmission rod 411 engages with the Z-direction cylindrical cam 412 via an external spline. The upper end face of the Z-direction cylindrical cam 412 is in close contact with the lower end face of the Z-direction main lead screw 402. A spiral groove is provided on the surface of the Z-direction cylindrical cam 412, and a Z-direction output rod 413 is provided in the spiral groove. The Z-direction output rod 413 passes through the guide groove in the middle of the Z-direction guide rod 414. The Z-direction guide rod 414 is fixed between the Z-direction upright plate 111 and the Z-direction lower upright plate 112, and the upper end face of the Z-direction guide rod 414 is in close contact with the lower end face of the Z-direction upright plate 111, and the lower end face of the Z-direction guide rod 414 is in close contact with the upper end face of the Z-direction lower upright plate 112.

[0034] The powder feeding head assembly 5 includes a powder feeding head 501, and a blind hole is provided on the back of the powder feeding head 501. The powder feeding head 501 is connected to the Z-direction output rod 413 through the blind hole.

[0035] Indicator component 6 includes an X-direction pointer 601, a Y-direction pointer 602, a Z-direction pointer 603, an X-direction scale 604, a Y-direction scale 605, and a Z-direction scale 606.

[0036] like Figure 3As shown, in this embodiment, the front end face of the X-direction cylindrical cam 212 is connected to the X-direction right semicircular box 214 and the X-direction left semicircular box 215 by bolts. The X-direction right semicircular box 214 and the X-direction left semicircular box 215 have the same structure and are symmetrically arranged to form a complete circular box. The X-direction main lead screw 202 passes through the through hole in the middle of the X-direction right semicircular box 214 and the X-direction left semicircular box 215. The inner wall surfaces of the X-direction right semicircular box 214 and the X-direction left semicircular box 215 are in close contact with the outer end face of the rear end boss of the X-direction main lead screw 202. The rear end of the X-direction main lead screw 202 is provided with a blind hole larger than the spline diameter of the X-direction cylindrical cam transmission rod 211.

[0037] like Figures 1 to 3 As shown, in this embodiment, the X-direction main lead screw 202 passes through a fixed X-direction front upright plate 105. One end of the X-direction main lead screw 202 is equipped with an X-direction main drive motor 201. When the X-direction main drive motor 201 rotates, the X-direction main lead screw 202 begins to rotate and moves along the X-direction direction through the X-direction front upright plate 105. The X-direction front large gear 205 on the X-direction main lead screw 202 rotates, and the X-direction front small gear 206 meshing with the X-direction front large gear 205 rotates as well. The rotation of the X-direction front pinion 206 will drive the rotation of the X-direction hollow rod 207. The rear end of the X-direction hollow rod 207 is engaged with the front end of the X-direction gear transmission rod 208 via an internal spline. Therefore, the rotation of the X-direction hollow rod 207 will drive the rotation of the X-direction gear transmission rod 208. The X-direction gear transmission rod 208 is fixed with an X-direction rear pinion 209. When the X-direction rear pinion 209 rotates, the X-direction rear large gear 210, which meshes with the X-direction rear pinion 209, will rotate. The X-direction rear large gear 210 is fixed on the X-direction cylindrical cam transmission rod 211, driving the X-direction cylindrical cam transmission rod 211 to rotate. The front end of the X-direction cylindrical cam transmission rod 211 engages with the X-direction cylindrical cam 212 via an external spline, driving the X-direction cylindrical cam 212 to rotate. The surface of the X-direction cylindrical cam 212 is provided with a helical groove, and an X-direction output rod 213 is provided in the helical groove on the surface of the X-direction cylindrical cam 212. The rotation of the X-direction cylindrical cam 212 will drive... The X-direction output rod 213 translates along the X-direction; the X-direction main lead screw 202 translates along the X-direction, which drives the X-direction cylindrical cam 212 to translate through the X-direction right semicircular box 214 and X-direction left semicircular box 215, thereby driving the X-direction output rod 213 to translate along the X-direction. The X-direction output rod 213 translates along the X-direction, which drives the Y-direction support seat 106 to translate along the X-direction. Through the rotation and translation of the X-direction cylindrical cam 212, the powder feeding head 501 moves rapidly along the X-direction.

[0038] like Figure 3 As shown, in this embodiment, the X-direction moving component 2 includes an X-direction fine-tuning drive motor 216, which is connected to an X-direction fine-tuning lead screw 217. The X-direction fine-tuning lead screw 217 passes through the X-direction fine-tuning plate 203 and the X-direction front upright plate 105. The X-direction fine-tuning plate 203 is connected to the X-direction fine-tuning gear cover 204 by bolts. The inner wall of the X-direction fine-tuning gear cover 204 is in close contact with the rear end faces of the X-direction front large gear 205 and the X-direction front small gear 206.

[0039] like Figures 1 to 3 As shown, in this embodiment, the X-direction fine-tuning screw 217 passes sequentially through the X-direction fine-tuning plate 203 and the X-direction front upright plate 105. The X-direction fine-tuning screw 217 has an X-direction fine-tuning drive motor 216 at its end. When the X-direction fine-tuning drive motor 216 rotates, the X-direction fine-tuning screw 217 begins to rotate and passes through the X-direction front upright plate 105, translating along the X-direction, causing the X-direction fine-tuning plate 203 to translate along the X-direction. The X-direction fine-tuning plate 203 translating along the X-direction will drive the X-direction fine-tuning gear cover 204, the... The X-direction front large gear 205 and the X-direction front small gear 206 translate along the X direction. The X-direction front large gear 205 is threadedly connected to the X-direction main lead screw 202, thereby driving the X-direction main lead screw 202 to translate along the X direction. The X-direction main lead screw 202 translates along the X direction, which in turn drives the X-direction cylindrical cam 212 to translate, thereby driving the X-direction output rod 213 to translate along the X direction. The X-direction output rod 213 translates along the X direction, which in turn drives the Y-direction support seat 106 to translate along the X direction, thus realizing the fine adjustment of the powder feeding head 501 along the X direction.

[0040] like Figure 4 As shown, in this embodiment, the right end face of the Y-direction cylindrical cam 312 is connected to the Y-direction rear semicircular box 315 and the Y-direction front semicircular box 316 by bolts. The Y-direction rear semicircular box 315 and the Y-direction front semicircular box 316 have the same structure and are symmetrically arranged to form a complete circular box. The Y-direction main lead screw 302 passes through the through hole in the middle of the Y-direction rear semicircular box 315 and the Y-direction front semicircular box 316. The inner wall surfaces of the Y-direction rear semicircular box 315 and the Y-direction front semicircular box 316 are in close contact with the outer end face of the left end boss of the Y-direction main lead screw 302. The left end of the Y-direction main lead screw 302 is provided with a blind hole larger than the spline diameter of the Y-direction cylindrical cam transmission rod 311.

[0041] like Figure 1 , Figure 2 and Figure 4As shown, in this embodiment, the Y-direction main lead screw 302 passes through a fixed Y-direction right vertical plate 109. A Y-direction main drive motor 301 is installed at one end of the Y-direction main lead screw 302. When the Y-direction main drive motor 301 rotates, the Y-direction main lead screw 302 begins to rotate and moves along the Y-direction through the Y-direction right vertical plate 109. The Y-direction right large gear 305 on the Y-direction main lead screw 302 rotates, and the Y-direction right small gear 306 meshing with the Y-direction right large gear 305 rotates. The rotation of the right-hand pinion 306 will drive the rotation of the Y-direction hollow rod 307. The left end of the Y-direction hollow rod 307 is connected to the right end of the Y-direction gear transmission rod 308 via an internal spline. Therefore, the rotation of the Y-direction hollow rod 307 will drive the rotation of the Y-direction gear transmission rod 308. The Y-direction gear transmission rod 308 is fixed with a Y-direction left pinion 309. When the Y-direction left pinion 309 rotates, the Y-direction left large gear 310, which meshes with the Y-direction left pinion 309, will rotate. Wheel 310 is fixed to the Y-direction cylindrical cam drive rod 311, driving the Y-direction cylindrical cam drive rod 311 to rotate. The right end of the Y-direction cylindrical cam drive rod 311 is engaged with the internal spline of the Y-direction cylindrical cam 312 via an external spline, driving the Y-direction cylindrical cam 312 to rotate. The surface of the Y-direction cylindrical cam 312 is provided with a helical groove, and a Y-direction output rod 313 is provided in the helical groove on the surface of the Y-direction cylindrical cam 312. Under the constraint of the Y-direction guide rod 314, the Y-direction cylindrical cam 312... Rotation will cause the Y-direction output rod 313 to translate along the Y-direction; the Y-direction main lead screw 302, when translated along the Y-direction, will drive the Y-direction cylindrical cam 312 to translate through the Y-direction rear semicircular box 315 and the Y-direction front semicircular box 316, thereby driving the Y-direction output rod 313 to translate along the Y-direction. The Y-direction output rod 313, when translated along the Y-direction, will drive the Z-direction base plate 110 to translate along the Y-direction. Through the rotation and translation of the Y-direction cylindrical cam 312, the powder feeding head 501 can move rapidly along the Y-direction.

[0042] like Figure 4 As shown, in this embodiment, the Y-direction moving component 3 includes a Y-direction fine-tuning drive motor 317, which is connected to a Y-direction fine-tuning screw 318. The Y-direction fine-tuning screw 318 passes through the Y-direction fine-tuning plate 303 and the Y-direction right vertical plate 109. The Y-direction fine-tuning plate 303 is connected to the Y-direction fine-tuning gear cover 304 by bolts. The inner wall of the Y-direction fine-tuning gear cover 304 is in close contact with the left end face of the Y-direction right large gear 305 and the Y-direction right small gear 306.

[0043] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the Y-direction fine-tuning screw 318 passes sequentially through the Y-direction fine-tuning plate 303 and the Y-direction right vertical plate 109. The Y-direction fine-tuning screw 318 has a Y-direction fine-tuning drive motor 317 at its end. When the Y-direction fine-tuning drive motor 317 rotates, the Y-direction fine-tuning screw 318 starts to rotate and passes through the Y-direction right vertical plate 109, translating along the Y-direction. This translation causes the Y-direction fine-tuning plate 303 to translate along the Y-direction. The translation of the Y-direction fine-tuning plate 303 along the Y-direction will drive the Y-direction fine-tuning gear cover 304, the... The right large gear 305 and the right small gear 306 in the Y direction move in the Y direction. The right large gear 305 in the Y direction is connected to the main lead screw 302 in the Y direction by a thread, thereby driving the main lead screw 302 in the Y direction to move in the Y direction. The main lead screw 302 in the Y direction moves in the Y direction, which in turn drives the cylindrical cam 312 in the Y direction to move in the Y direction, which in turn drives the output rod 313 in the Y direction to move in the Y direction. The output rod 313 in the Y direction moves in the Y direction, which in turn drives the base plate 110 in the Z direction to move in the Y direction, thereby realizing the fine adjustment of the powder feeding head 501 in the Y direction.

[0044] like Figure 5 As shown, the upper end face of the Z-direction cylindrical cam 412 is connected to the left semicircular box 415 and the right semicircular box 416 in the Z-direction direction by bolts. The left semicircular box 415 and the right semicircular box 416 in the Z-direction direction have the same structure and are symmetrically arranged to form a complete circular box. The Z-direction main lead screw 402 passes through the through hole in the middle of the left semicircular box 415 and the right semicircular box 416 in the Z-direction direction. The inner wall surfaces of the left semicircular box 415 and the right semicircular box 416 in the Z-direction direction are in close contact with the outer end face of the lower boss of the Z-direction main lead screw 402. The lower end of the Z-direction main lead screw 402 is provided with a blind hole larger than the spline diameter of the Z-direction cylindrical cam transmission rod 411.

[0045] like Figure 5As shown, in this embodiment, the Z-direction main lead screw 402 passes through a fixed Z-direction vertical plate 111. A Z-direction main drive motor 401 is mounted at one end of the Z-direction main lead screw 402. When the Z-direction main drive motor 401 rotates, the Z-direction main lead screw 402 begins to rotate and moves along the Z-direction direction through the Z-direction vertical plate 111. The large Z-direction gear 405 on the Z-direction main lead screw 402 rotates, and the small Z-direction gear 406 meshing with the large Z-direction gear 405 rotates. The rotation of the small gear 406 in the Z direction will drive the rotation of the hollow rod 407 in the Z direction. The lower end of the hollow rod 407 in the Z direction is engaged with the upper end of the external spline of the gear transmission rod 408 in the Z direction through an internal spline. Therefore, the rotation of the hollow rod 407 in the Z direction will drive the rotation of the gear transmission rod 408 in the Z direction. The gear transmission rod 408 in the Z direction is fixed with a downward small gear 409 in the Z direction. When the downward small gear 409 in the Z direction rotates, the downward large gear 410 in the Z direction, which meshes with the downward small gear 409, will rotate. The Z-direction lower large gear 410 is fixed on the Z-direction cylindrical cam transmission rod 411, driving the Z-direction cylindrical cam transmission rod 411 to rotate. The upper end of the Z-direction cylindrical cam transmission rod 411 is engaged with the internal spline of the Z-direction cylindrical cam 412 via an external spline, driving the Z-direction cylindrical cam 412 to rotate. The surface of the Z-direction cylindrical cam 412 is provided with a helical groove, and a Z-direction output rod 413 is provided in the helical groove on the surface of the Z-direction cylindrical cam 412. The rotation of the Z-direction cylindrical cam 412 will... The Z-direction output rod 413 is driven to translate along the Z-direction; the Z-direction main lead screw 402 translates along the Z-direction, which in turn drives the Z-direction cylindrical cam 412 to translate through the Z-direction left semicircular box 415 and Z-direction right semicircular box 416, thereby driving the Z-direction output rod 413 to translate along the Z-direction. The Z-direction output rod 413 translates along the Z-direction, which in turn drives the powder feeding head 501 to translate along the Z-direction. Through the rotation and translation of the Z-direction cylindrical cam 412, the powder feeding head 501 moves rapidly along the Z-direction.

[0046] like Figure 5 As shown, in this embodiment, the Z-direction moving component 4 includes a Z-direction fine-tuning drive motor 417, which is connected to a Z-direction fine-tuning lead screw 418. The Z-direction fine-tuning lead screw 418 passes through the Z-direction fine-tuning plate 403 and the Z-direction upright plate 111. The Z-direction fine-tuning plate 403 is connected to the Z-direction fine-tuning gear cover 404 by bolts. The inner wall of the Z-direction fine-tuning gear cover 404 is in close contact with the lower end face of the large gear 405 and the small gear 406 in the Z-direction direction.

[0047] like Figure 5As shown, in this embodiment, the Z-direction fine-tuning screw 418 passes sequentially through the Z-direction fine-tuning plate 403 and the Z-direction upright plate 111. The Z-direction fine-tuning screw 418 has a Z-direction fine-tuning drive motor 417 at its end. When the Z-direction fine-tuning drive motor 417 rotates, the Z-direction fine-tuning screw 418 begins to rotate and moves along the Z-direction, passing through the Z-direction upright plate 111, causing the Z-direction fine-tuning plate 403 to move along the Z-direction. The Z-direction fine-tuning plate 403 moving along the Z-direction will drive the Z-direction fine-tuning gear cover 404, and so on... The large gear 405 and the small gear 406 in the Z direction translate along the Z direction. The large gear 405 in the Z direction is connected to the main lead screw 402 in the Z direction by a thread, thereby driving the main lead screw 402 in the Z direction to translate along the Z direction. The translation of the main lead screw 402 in the Z direction will drive the cylindrical cam 412 in the Z direction to translate, thereby driving the output rod 413 in the Z direction to translate along the Z direction. The translation of the output rod 413 in the Z direction will drive the powder feeding head 501 to translate along the Z direction, realizing the fine adjustment of the powder feeding head 501 in the Z direction.

[0048] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the right end face of the X-direction right support 103 is provided with the X-direction scale 604, the X-direction pointer 601 is provided on the X-direction output rod 213, the front end face of the Y-direction base plate 107 is provided with the Y-direction scale 605, the Y-direction pointer 602 is provided on the Y-direction output rod 313, the front end face of the Z-direction base plate 110 is provided with the Z-direction scale 606, and the Z-direction pointer 603 is provided on the Z-direction output rod 413.

[0049] Therefore, the above embodiments of the present invention provide a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing. This mechanism comprises a base assembly 1, an X-direction movement assembly 2, a Y-direction movement assembly 3, a Z-direction movement assembly 4, a powder feeding head assembly 5, and an indicator assembly 6. The X-direction movement assembly 2, Y-direction movement assembly 3, and Z-direction movement assembly 4 all utilize a combination of lead screws and cylindrical cams to control the position of the powder feeding head assembly 5. This enables rapid movement of the powder feeding head along the X, Y, and Z axes, and precise control of the powder feeding head position is achieved through a fine-tuning device. The indicator assembly displays the real-time position of the powder feeding head, facilitating adjustment. The present invention features a novel structure, ease of manufacture, and flexible operation, enabling rapid and precise adjustment of the powder feeding head position, thereby improving the quality and efficiency of laser powder feeding additive manufacturing.

[0050] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A double-precision motion control mechanism for a powder feeding head in laser additive manufacturing, characterized in that, include: A base assembly (1) includes a base (101), on which a left support seat (102) in the X direction, a right support seat (103) in the X direction, a rear upright plate (104) in the X direction, and a front upright plate (105) in the X direction are provided. A dovetail groove is provided on the left support seat (102) in the X direction, which is connected to the dovetail structure on the left side of the support seat (106) in the Y direction. A dovetail groove is provided on the right support seat (103) in the X direction, which is connected to the dovetail structure on the right side of the support seat (106) in the Y direction. The tail structure is connected, and a Y-direction base plate (107) is fixed on the Y-direction support seat (106). A Y-direction left upright plate (108) is fixed on the left side of the Y-direction base plate (107), and a Y-direction right upright plate (109) is fixed on the right side of the Y-direction base plate (107). The base assembly (1) also includes a Z-direction base plate (110). A Z-direction upward upright plate (111) is fixed on the upper side of the Z-direction base plate (110), and a Z-direction downward upright plate (112) is fixed on the lower side of the Z-direction base plate (110). An X-direction moving assembly (2) includes an X-direction main drive motor (201) connected to an X-direction main lead screw (202). The X-direction main lead screw (202) passes through the X-direction front upright plate (105), the X-direction fine-tuning plate (203), and the X-direction fine-tuning gear cover (204). The X-direction main lead screw (202) engages with the internal thread of the X-direction front large gear (205) via an external thread. The large gear (205) in the X direction meshes with the small gear (206) in the X direction. The small gear (206) in the X direction is fixed on the hollow rod (207) in the X direction. The front end of the hollow rod (207) in the X direction passes through the front plate (105) in the X direction, the fine-tuning plate (203) in the X direction, and the fine-tuning gear cover (204) in the X direction. The rear end of the hollow rod (207) in the X direction is engaged with the front end of the gear transmission rod (208) in the X direction via an internal spline. The rear end of the gear transmission rod (208) passes through the rear vertical plate (104) in the X direction. An X-direction rear pinion (209) is fixed on the X-direction gear transmission rod (208). The X-direction rear pinion (209) meshes with the X-direction rear large gear (210). The X-direction rear large gear (210) is fixed on the X-direction cylindrical cam transmission rod (211). The rear end of the X-direction cylindrical cam transmission rod (211) passes through the rear vertical plate (104) in the X direction. The X-direction cylindrical cam... The front end of the wheel drive rod (211) is engaged with the internal spline of the X-direction cylindrical cam (212) via an external spline. The front end face of the X-direction cylindrical cam (212) is in close contact with the rear end face of the X-direction main screw (202). The surface of the X-direction cylindrical cam (212) is provided with a spiral groove. An X-direction output rod (213) is provided in the spiral groove on the surface of the X-direction cylindrical cam (212). The X-direction output rod (213) passes through the blind hole on the right end face of the Y-direction support seat (106). The Y-direction moving assembly (3) includes a Y-direction main drive motor (301), which is connected to a Y-direction main lead screw (302). The Y-direction main lead screw (302) passes through the Y-direction right vertical plate (109), the Y-direction fine-tuning plate (303), and the Y-direction fine-tuning gear cover (304). The Y-direction main lead screw (302) is threaded with the Y-direction right large gear (305) via an external thread. The Y-direction right large gear (305) meshes with the Y-direction right small gear (306). A gear (306) is fixed on a hollow rod (307) in the Y direction. The right end of the hollow rod (307) passes through the right vertical plate (109) in the Y direction, the fine-tuning plate (303) in the Y direction, and the fine-tuning gear cover (304) in the Y direction. The left end of the hollow rod (307) is engaged with the external spline on the right end of the gear transmission rod (308) in the Y direction via an internal spline. The left end of the gear transmission rod (308) passes through the left vertical plate (108) in the Y direction. A left pinion (309) in the Y direction is fixed on the gear transmission rod (308). (309) meshes with the left large gear (310) in the Y direction. The left large gear (310) in the Y direction is fixed on the cylindrical cam transmission rod (311) in the Y direction. The left end of the cylindrical cam transmission rod (311) in the Y direction passes through the left vertical plate (108) in the Y direction. The right end of the cylindrical cam transmission rod (311) in the Y direction is engaged with the internal spline of the cylindrical cam (312) in the Y direction through an external spline. The right end face of the cylindrical cam (312) in the Y direction is in close contact with the left end face of the main lead screw (302) in the Y direction. The surface of the cylindrical cam (312) in the Y direction is provided with a spiral groove. A Y-direction output rod (313) is provided in the spiral groove on the surface of the cam (312). The Y-direction output rod (313) passes through the guide groove in the middle of the Y-direction guide rod (314) and enters the blind hole on the rear end face of the Z-direction base plate (110). The Y-direction guide rod (314) is fixed between the Y-direction left vertical plate (108) and the Y-direction right vertical plate (109). The left end face of the Y-direction guide rod (314) is close to the right end face of the Y-direction left vertical plate (108), and the right end face of the Y-direction guide rod (314) is close to the left end face of the Y-direction right vertical plate (109). A Z-direction moving assembly (4) includes a Z-direction main drive motor (401) connected to a Z-direction main lead screw (402). The Z-direction main lead screw (402) passes through a Z-direction upright plate (111), a Z-direction fine-tuning plate (403), and a Z-direction fine-tuning gear cover (404). The Z-direction main lead screw (402) engages with the internal thread of a large gear (405) in the Z-direction via an external thread. The large gear (405) meshes with a small gear (406) in the Z-direction. The Z-direction pinion (406) is fixed on the Z-direction hollow rod (407). The upper end of the Z-direction hollow rod (407) passes through the Z-direction upright plate (111), the Z-direction fine-tuning plate (403), and the Z-direction fine-tuning gear cover (404). The lower end of the Z-direction hollow rod (407) is engaged with the upper end of the Z-direction gear transmission rod (408) via an internal spline. The lower end of the Z-direction gear transmission rod (408) passes through the Z-direction lower upright plate (112). The Z-direction lower pinion (409) is fixed on the Z-direction gear transmission rod (408). The Z-direction lower pinion (409) meshes with the Z-direction lower gear (410). The Z-direction lower gear (410) is fixed on the Z-direction cylindrical cam transmission rod (411). The lower end of the Z-direction cylindrical cam transmission rod (411) passes through the Z-direction lower vertical plate (112). The upper end of the Z-direction cylindrical cam transmission rod (411) is engaged with the internal spline of the Z-direction cylindrical cam (412) via an external spline. The upper end face of the Z-direction cylindrical cam (412) is in close contact with the lower end face of the Z-direction main lead screw (402). The surface of the Z-direction cylindrical cam (412) is provided with a spiral groove. A Z-direction output rod (413) is provided in the spiral groove on the surface of the Z-direction cylindrical cam (412). The Z-direction output rod (413) passes through the guide groove in the middle of the Z-direction guide rod (414). The Z-direction guide rod (414) is fixed between the Z-direction upright plate (111) and the Z-direction lower upright plate (112). The upper end face of the Z-direction guide rod (414) is close to the lower end face of the Z-direction upright plate (111), and the lower end face of the Z-direction guide rod (414) is close to the upper end face of the Z-direction lower upright plate (112). The powder feeding head assembly (5) includes a powder feeding head (501), the powder feeding head (501) has a blind hole on its back side, and the powder feeding head (501) is connected to the Z-direction output rod (413) through the blind hole; The indicator component (6) includes an X-direction pointer (601), a Y-direction pointer (602), a Z-direction pointer (603), an X-direction scale (604), a Y-direction scale (605), and a Z-direction scale (606).

2. The dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The front end face of the X-direction cylindrical cam (212) is connected to the X-direction right semicircular box (214) and the X-direction left semicircular box (215) by bolts. The X-direction right semicircular box (214) and the X-direction left semicircular box (215) have the same structure and are arranged symmetrically to form a complete circular box. The X-direction main lead screw (202) passes through the through hole in the middle of the X-direction right semicircular box (214) and the X-direction left semicircular box (215). The inner wall surfaces of the X-direction right semicircular box (214) and the X-direction left semicircular box (215) are in close contact with the outer end face of the rear end boss of the X-direction main lead screw (202). The rear end of the X-direction main lead screw (202) is provided with a blind hole larger than the spline major diameter of the X-direction cylindrical cam transmission rod (211).

3. The dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The X-direction moving component (2) includes an X-direction fine-tuning drive motor (216), which is connected to an X-direction fine-tuning screw (217). The X-direction fine-tuning screw (217) passes through the X-direction fine-tuning plate (203) and the X-direction front upright plate (105). The X-direction fine-tuning plate (203) is connected to the X-direction fine-tuning gear cover (204) by bolts. The inner wall of the X-direction fine-tuning gear cover (204) is in close contact with the rear end face of the X-direction front large gear (205) and the X-direction front small gear (206).

4. The dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The right end face of the Y-direction cylindrical cam (312) is connected to the Y-direction rear semicircular box (315) and the Y-direction front semicircular box (316) by bolts. The Y-direction rear semicircular box (315) and the Y-direction front semicircular box (316) have the same structure and are arranged symmetrically to form a complete circular box. The Y-direction main lead screw (302) passes through the through hole in the middle of the Y-direction rear semicircular box (315) and the Y-direction front semicircular box (316). The inner wall surfaces of the Y-direction rear semicircular box (315) and the Y-direction front semicircular box (316) are in close contact with the outer end face of the left end boss of the Y-direction main lead screw (302). The left end of the Y-direction main lead screw (302) is provided with a blind hole larger than the major diameter of the spline of the Y-direction cylindrical cam transmission rod (311).

5. A dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The Y-direction moving component (3) includes a Y-direction fine-tuning drive motor (317), which is connected to a Y-direction fine-tuning screw (318). The Y-direction fine-tuning screw (318) passes through the Y-direction fine-tuning plate (303) and the Y-direction right vertical plate (109). The Y-direction fine-tuning plate (303) is connected to the Y-direction fine-tuning gear cover (304) by bolts. The inner wall of the Y-direction fine-tuning gear cover (304) is in close contact with the left end face of the Y-direction right large gear (305) and the Y-direction right small gear (306).

6. The dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The upper end face of the Z-direction cylindrical cam (412) is connected to the Z-direction left semicircular box (415) and the Z-direction right semicircular box (416) by bolts. The Z-direction left semicircular box (415) and the Z-direction right semicircular box (416) have the same structure and are arranged symmetrically to form a complete circular box. The Z-direction main lead screw (402) passes through the through hole in the middle of the Z-direction left semicircular box (415) and the Z-direction right semicircular box (416). The inner wall surfaces of the Z-direction left semicircular box (415) and the Z-direction right semicircular box (416) are in close contact with the outer end face of the lower boss of the Z-direction main lead screw (402). The lower end of the Z-direction main lead screw (402) is provided with a blind hole larger than the spline major diameter of the Z-direction cylindrical cam transmission rod (411).

7. A dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The Z-direction moving component (4) includes a Z-direction fine-tuning drive motor (417), which is connected to a Z-direction fine-tuning screw (418). The Z-direction fine-tuning screw (418) passes through the Z-direction fine-tuning plate (403) and the Z-direction upright plate (111). The Z-direction fine-tuning plate (403) is connected to the Z-direction fine-tuning gear cover (404) by bolts. The inner wall of the Z-direction fine-tuning gear cover (404) is in close contact with the lower end face of the large gear (405) and the small gear (406) in the Z-direction direction.

8. A dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing according to claim 1, characterized in that, The right end face of the X-direction right support (103) is provided with the X-direction scale (604), the X-direction pointer (601) is provided on the X-direction output rod (213), the front end face of the Y-direction base plate (107) is provided with the Y-direction scale (605), the Y-direction pointer (602) is provided on the Y-direction output rod (313), the front end face of the Z-direction base plate (110) is provided with the Z-direction scale (606), and the Z-direction pointer (603) is provided on the Z-direction output rod (413).

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