Swinging powder spreading 3D printing device

Abstract

The invention discloses a swing powder laying 3D printing device, and relates to the technical field of 3D printers, the swing powder laying 3D printing device comprises a case internally provided with a processing table top, and further comprises a swing frame, a rotating rod, a linkage assembly and a driving part, and the swing frame is rotationally connected into the case through a first rotating shaft; the rotating rod is rotationally connected to the swing frame, a plurality of connecting frames are fixedly connected to the rotating rod, a paving roller is fixedly connected to each connecting frame, and a paving station attached to the machining table top is arranged in the rotating stroke, relative to the swing frame, of each paving roller; the linkage assembly is used for driving the paving rollers to sequentially rotate to a paving station; the driving part is used for driving the swing frame to rotate, in the rotating process of the rotating rod, the paving roller, located on the paving station, on the rotating rod can be driven to be separated from the paving station and the next paving roller moves to the paving station, the paving rollers are selected according to metal powder, and a worker only needs to control the driving part and the linkage assembly to work, so that the paving rollers on the rotating rod can be replaced; working of workers is facilitated, and working efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printers, and in particular to a swing powder spreading 3D printing device. Background Art

[0002] A 3D printing device, also known as a 3D printer, is a device that can manufacture three-dimensional objects by adding materials based on three-dimensional model data. A 3D printing device is usually based on additive manufacturing technology. It cuts the three-dimensional model into a series of two-dimensional slices, and then stacks the materials layer by layer from bottom to top according to the slice information, eventually forming a three-dimensional solid model.

[0003] The patent with publication number CN112238610A discloses a powder spreading device, a 3D printing device and a powder spreading method, which includes a main structure, a powder spreading roller and a roller driving member, wherein the main structure is used to be installed on a motion module, the powder spreading roller is rotatably installed on the main structure, and a flexible sweeping brush structure is provided on the surface of the powder spreading roller. The roller driving member is installed on the main structure and is connected to the powder spreading roller drive. When in use, the roller driving member drives the powder spreading roller to rotate, and the powder layer on the area to be powdered is swept flat by the flexible sweeping brush structure, which can reduce the shear force of the powder spreading, has little interference with the workpiece to be processed, and spreads the powder flat.

[0004] The prior art such as that in the above-mentioned patent can spread the metal powder evenly through a powder spreading roller. However, a 3D printer can use different metal powders to print different products, and different metal powders require different powder spreading rollers. Therefore, it is particularly important to be able to replace the powder spreading roller conveniently and quickly. Summary of the invention

[0005] The purpose of the present invention is to provide a swing powder spreading 3D printing device to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a swing powder-laying 3D printing device, comprising a chassis with a processing table arranged inside, and also comprising: a swing frame, which is rotatably connected in the chassis through a first rotating shaft; a rotating rod, which is rotatably connected to the swing frame, and a plurality of connecting frames are fixedly connected to the swing frame, each connecting frame is fixedly connected to a laying roller, and each laying roller has a paving station that is in contact with the processing table in its rotational stroke relative to the swing frame; a linkage assembly, which is used to drive each laying roller to rotate to the paving station in sequence; and a driving member, which is used to drive the swing frame to rotate.

[0007] Furthermore, the linkage assembly includes: a gear, which is coaxially fixedly connected to the rotating rod; an arc-shaped plate, which is rotatably connected in the chassis via a second rotating shaft, and on which is slidably connected an arc-shaped rack that can mesh with the gear; a slide rod, which is vertically slidably connected in the chassis; a telescopic rod, one end of which is fixedly connected to the slide rod and the other end is hinged to the arc-shaped rack; a spiral groove is provided on the second rotating shaft, and a ball bearing that rolls with the spiral groove is provided on the slide rod; and a hydraulic cylinder, which is used to drive the slide rod to slide vertically.

[0008] Furthermore, the hydraulic cylinder includes a cylinder body and a piston rod, the cylinder body is fixedly connected to the chassis, the piston rod is slidably connected to the cylinder body, and the piston rod is coaxially fixedly connected to the sliding rod.

[0009] Furthermore, an arc-shaped slide groove is provided on the arc-shaped plate, a slider is slidably connected to the arc-shaped slide groove, and the slider is fixedly connected to the arc-shaped rack.

[0010] Furthermore, the telescopic rod includes a sleeve rod and an inner rod, the sleeve rod is fixedly connected to the sliding rod, the inner rod is slidably connected to the sleeve rod, the inner rod is hinged to the arc-shaped rack, and an elastic member is provided between the sleeve rod and the inner rod.

[0011] Furthermore, it also includes a locking member, which is used to lock and fix the rotating rod and the swing frame.

[0012] Furthermore, the driving member includes a driving motor, and an output shaft of the driving motor is coaxially and fixedly connected to the first rotating shaft.

[0013] Furthermore, the locking member includes an electric latch and a plurality of sockets formed on the rotating rod.

[0014] Compared with the prior art, the present invention provides a swinging powder-spreading 3D printing device. During the rotation of the swing frame relative to the chassis, one of the spreading rollers on the swing frame can spread the metal powder on the processing table evenly. After the metal powder is replaced, the spreading roller needs to be replaced. It is only necessary to rotate the swing frame away from the processing table, and drive the rotating rod to rotate through the linkage assembly. During the rotation of the rotating rod, the spreading roller on the rotating rod at the flattening station can be driven to separate from the flattening station and the next spreading roller can be moved to the flattening station. The spreading roller is selected according to the metal powder. The worker only needs to control the operation of the driving member and the linkage assembly to realize the replacement of the spreading roller on the rotating rod, which is convenient for the worker's work and can improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of a chassis structure provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of each paving roller relative to the swing frame provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the linkage component structure provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the structure of a telescopic rod and a hydraulic cylinder provided in an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the matching structure of the second rotating shaft and the sliding rod provided in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the locking member structure provided in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Chassis; 11. Processing table; 2. Swing frame; 21. First rotating shaft; 3. Rotating rod; 31. Connecting frame; 311. Laying roller; 4. Linkage assembly; 41. Gear; 42. Arc plate; 421. Arc slide; 43. Arc rack; 44. Slide rod; 45. Telescopic rod; 451. Sleeve rod; 452. Inner rod; 46. Hydraulic cylinder; 461. Cylinder body; 462. Piston rod; 5. Second rotating shaft; 51. Spiral groove; 6. Locking piece. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] See also Figure 1-6 An embodiment of the present invention provides a swing powder spreading 3D printing device, including a chassis 1 with a processing table 11 arranged inside, and also includes a swing frame 2, a rotating rod 3, a linkage assembly 4 and a driving member. The swing frame 2 is rotatably connected to the chassis 1 through a first rotating shaft 21; the rotating rod 3 is rotatably connected to the swing frame 2, and a plurality of connecting frames 31 are fixedly connected to the rotating rod 3, and each connecting frame 31 is fixedly connected to a spreading roller 311, and each spreading roller 311 has a spreading station that is in contact with the processing table 11 in its rotation stroke relative to the swing frame 2; the linkage assembly 4 is used to drive each spreading roller 311 to rotate to the spreading station in sequence; the driving member is used to drive the swing frame 2 to rotate.

[0026] Specifically, the linkage assembly 4 includes a gear 41, an arc plate 42, a slide bar 44, a telescopic rod 45 and a hydraulic cylinder 46. The gear 41 is coaxially fixedly connected to the rotating rod 3; the arc plate 42 is rotatably connected to the chassis 1 through the second rotating shaft 5, and an arc rack 43 that can mesh with the gear 41 is slidably connected to the arc plate 42; the slide bar 44 is vertically slidably connected to the chassis 1; one end of the telescopic rod 45 is fixedly connected to the slide bar 44, and the other end is hinged to the arc rack 43; a spiral groove 51 is provided on the second rotating shaft 5, and a ball rolling with the spiral groove 51 is provided on the slide bar 44; the hydraulic cylinder 46 is used to drive the slide The rod 44 slides vertically; the hydraulic cylinder 46 includes a cylinder body 461 and a piston rod 462, the cylinder body 461 is fixedly connected to the chassis 1, the piston rod 462 is slidably connected to the cylinder body 461, the piston rod 462 is coaxially fixedly connected to the sliding rod 44, the telescopic rod 45 includes a sleeve rod 451 and an inner rod 452, the sleeve rod 451 is fixedly connected to the sliding rod 44, the inner rod 452 is slidably connected to the sleeve rod 451, the inner rod 452 is hinged to the arc-shaped rack 43, an elastic member is arranged between the sleeve rod 451 and the inner rod 452, the elastic member includes a spring, one end of the spring is connected to the inner rod 452, and the other end is connected to the inner wall of the sleeve rod 451.

[0027] Working principle: the output shaft of the driving motor is coaxially fixed with the first rotating shaft 21, and the output shaft of the driving motor can rotate clockwise and counterclockwise to realize the reciprocating swinging rotation of the swing frame 2 on the first rotating shaft 21. The paving roller 311 at the paving station on the swing frame 2 performs reciprocating swinging motion to realize the even spreading of the iron powder on the processing table 11 (the processing table 11 is lowered by the device in the chassis 1 and then the iron powder is unloaded onto the processing table 11 by the unloading mechanism. This is the prior art and will not be elaborated on here). Then the product is printed out. If another material product needs to be printed and another kind of iron powder is needed, the matching paving roller 311 is needed to spread the other kind of iron powder. At this time, the worker needs to control the driving motor to swing The paving roller 311 on the frame 2 which is in the paving station is separated from the processing table 11, so that the gear 41 on the rotating rod 3 is close to the arc-shaped rack 43 on the arc plate 42, and the piston rod 462 of the hydraulic cylinder 46 is away from the cylinder body 461, driving the sliding rod 44 to slide vertically downward, so that the telescopic rod 45 moves vertically downward, and the inner rod 452 gradually moves away from the sleeve rod 451 during the vertical downward movement of the telescopic rod 45, so that the slider hinged to the inner rod 452 can move along the arc-shaped slide groove 421, and the movement of the slider along the arc-shaped slide groove 421 makes the arc-shaped rack 43 fixedly connected to the slider also move along the arc-shaped slide groove 421, and the sliding of the arc-shaped rack 43 can cooperate with the gear 41 to make the rotating rod 3 coaxially fixedly connected to the gear 41 rotate, and during the rotation of the rotating rod 3 The connecting frames 31 are caused to rotate, so that the next paving roller 311 can be rotated to the paving station (relative to the swing frame 2), and the arc rack 43 is disengaged from the gear 41. With the further movement of the slide bar 44, the slide bar 44 can be inserted into the slot of the second shaft 5. The ball on the slide bar 44 cooperates with the spiral groove 51 in the second shaft 5 so that the second shaft 5 can rotate relative to the chassis 1. The rotation of the second shaft 5 can drive the arc plate 42 to rotate away from the swing frame 2. Thereafter, the first shaft 21 is driven to rotate by the driving motor, and the first shaft 21 drives the swing frame 2 to swing so that the paving roller 311 at the paving station can cooperate with the processing table 11 again, and then the piston rod 462 of the hydraulic cylinder 46 is used to restore the paving station. The inner rod 452 of the telescopic rod 45 gradually approaches the sleeve rod 451 (the elastic force of the spring in this process can make the inner rod 452 contract more smoothly relative to the sleeve rod 451), and the slider on the inner rod 452 moves along the arc groove 421, and the arc rack 43 is driven to move by the sliding of the slider so that the arc rack 43 can be reset. During the reset process, the gear 41 and the swing frame 2 are separated from the position of cooperating with the arc rack 43, so the arc rack 43 does not mesh with the gear 41 during the movement process.This achieves the resetting of the arc plate 42 and the resetting of the arc rack 43 on the arc plate 42.

[0028] The worker observes whether the paving roller 311 at the paving station can cooperate with the iron powder. If it is not the required paving roller 311, it needs to be adjusted again to make the gear 41 and the arc rack 43 cooperate again. Repeat the above steps. When the required paving roller 311 is in the paving station relative to the swing frame 2, stop the cooperation between the gear 41 and the arc rack 43. In this way, the selection of the paving roller 311 is completed. The worker only needs to control the number of times the gear 41 and the arc rack 43 cooperate according to the type of iron powder.

[0029] Compared with the prior art, the present invention provides a swing powder spreading 3D printing device. During the rotation of the swing frame 2 relative to the chassis 1, one of the spreading rollers 311 on the swing frame 2 can spread the metal powder on the processing table 11. After the metal powder is replaced, the spreading roller 311 needs to be replaced. It is only necessary to rotate the swing frame 2 away from the processing table 11, and drive the rotating rod 3 to rotate through the linkage component 4. During the rotation of the rotating rod 3, the spreading roller 311 on the rotating rod 3 at the paving station can be driven to separate from the paving station and move to the next paving roller 311 to the paving station. The spreading roller 311 is selected according to the metal powder. The worker only needs to control the operation of the driving member and the linkage component 4 to realize the replacement of the spreading roller 311 on the rotating rod 3, which is convenient for the worker's work and can improve work efficiency.

[0030] It also includes a locking member 6, which is used to lock and fix the rotating rod 3 and the swing frame 2. The locking member 6 includes an electric latch and a plurality of sockets provided on the rotating rod 3. The locking and fixation of the rotating rod 3 relative to the swing frame 2 is achieved through the cooperation of the latch and the socket, so that one of the paving rollers 311 can always be maintained at the paving position relative to the swing frame 2, thereby enabling the paving roller 311 at the paving position to be stable during the movement.

[0031] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A swing powder spreading 3D printing device, comprising a chassis with a processing table disposed therein, characterized in that: Also includes: A swing frame, which is rotatably connected in the chassis via a first rotating shaft; A rotating rod is rotatably connected to a swing frame, and a plurality of connecting frames are fixedly connected to the rotating rod, each connecting frame is fixedly connected to a paving roller, and each paving roller has a paving station that fits the processing table surface in the rotation stroke relative to the swing frame; A linkage assembly, which is used to drive each paving roller to rotate to the paving station in sequence; A driving member is used to drive the swing frame to rotate.

2. The oscillating powder spreading 3D printing device according to claim 1, characterized in that: The linkage components include: A gear, which is coaxially and fixedly connected with the rotating rod; An arc-shaped plate, which is rotatably connected in the chassis via a second rotating shaft, and on which an arc-shaped rack capable of meshing with the gear is slidably connected; A slide bar, which is vertically slidably connected in the chassis; A telescopic rod, one end of which is fixedly connected to the slide bar and the other end of which is hinged to the arc-shaped rack; The second rotating shaft is provided with a spiral groove, and the sliding rod is provided with a ball rolling in cooperation with the spiral groove; The hydraulic cylinder is used to drive the slide bar to slide vertically.

3. The swing powder spreading 3D printing device according to claim 1, characterized in that: The hydraulic cylinder comprises a cylinder body and a piston rod, wherein the cylinder body is fixedly connected to the chassis, the piston rod is slidably connected to the cylinder body, and the piston rod is coaxially fixedly connected to the sliding rod.

4. The swing powder spreading 3D printing device according to claim 1, characterized in that: The arc plate is provided with an arc-shaped slide groove, the arc-shaped slide groove is slidably connected with a slider, and the slider is fixedly connected to the arc-shaped rack.

5. The swing powder spreading 3D printing device according to claim 1, characterized in that: The telescopic rod comprises a sleeve rod and an inner rod, the sleeve rod is fixedly connected to the sliding rod, the inner rod is slidably connected to the sleeve rod, the inner rod is hinged to the arc-shaped rack, and an elastic member is arranged between the sleeve rod and the inner rod.

6. The swing powder spreading 3D printing device according to claim 1, characterized in that: It also includes a locking piece, which is used to lock and fix the rotating rod and the swing frame.

7. The swing powder spreading 3D printing device according to claim 1, characterized in that: The driving member comprises a driving motor, and an output shaft of the driving motor is coaxially and fixedly connected with the first rotating shaft.

8. The swing powder spreading 3D printing device according to claim 1, characterized in that: The locking member comprises an electric bolt and a plurality of insertion holes arranged on the rotating rod.

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