WO2017161585A1

WO2017161585A1 - 3d printer

Info

Publication number: WO2017161585A1
Application number: PCT/CN2016/077424
Authority: WO
Inventors: 陈名乔
Original assignee: 深圳万为智能制造科技有限公司
Priority date: 2016-03-25
Filing date: 2016-03-25
Publication date: 2017-09-28
Also published as: CN106515019A

Abstract

A 3D printer comprises: a vertical post assembly (1); a longitudinal beam assembly (2); and a transverse beam assembly (3). The longitudinal beam assembly (2) and the transverse beam assembly (3) are arranged on the vertical post assembly (1). A Z-axis driving device (12) is disposed on the vertical post assembly (1). A print head (4) is arranged on a transverse beam (31). The center of gravity of the print head (4) is close to the center of gravity of the transverse beam assembly (3). The print head (4) only moves in a short distance in the Z-axis direction, such that when the longitudinal beam assembly (2) and the transverse beam assembly (3) drive the print head (4) to print at a high speed, the print head (4) only experiences very low vibration. The stable print head (4) can realize high precision printing. Moreover, the vertical post assembly (1) drives the print head (4) to move in the Z-axis direction, such that the print head (4) can print a very tall product.

Description

Title of the invention: 3D printer

Technical field

[0001] The present invention relates to a 3D printer device, and in particular to a 3D printer.

[0002]

BACKGROUND

[0004] In order to realize the movement of the machining head in the three directions of X, Y and Z axes, the large machine tool requires three directions of driving devices in the X, Y and Z axes. The existing large machine tools mainly include two types of structures. The first type is the moving beam type, the Y-axis driving rail is set at the lower end, the gantry frame is mounted on the lower Y-axis driving rail, the X and z-axis driving devices are mounted on the gantry frame, and the gantry frame is along the Y. The axis moves and the table does not move. This result is due to the large size and weight of the gantry frame and the X-axis and z-axis. The center of gravity is high, and these mechanisms move along the Y-axis, and the Y-axis drive track is set. Near the lower end of the ground, resulting in a center of gravity much higher than the drive plane, not suitable for high-speed motion. In the second type of moving table, the table is mounted on the Y-axis rail, the gantry frame is fixedly above the table, the X-axis and the z-axis are mounted on the beam of the gantry frame, and the table can be moved along the Y-axis. The workbench of this mechanism needs to be moved, and for the workbench of a large machine tool, the workbench is very large in size and weight and is not suitable for high-speed movement. Therefore, the drive frame of the prior art large machine tool cannot meet the precision requirements of the 3D printer.

[0005]

SUMMARY OF THE INVENTION

The present application provides a 3D printer that is structurally stable and capable of meeting high speed motion.

[0008] In one embodiment, a 3D printer is provided, including a driving frame and a print head, and the driving frame includes:

[0009] a column assembly comprising a column and a Z-axis driving device correspondingly mounted on the column;

[0010] a longitudinal beam assembly comprising a longitudinal beam and a Y-axis driving device correspondingly mounted on the longitudinal beam; the longitudinal beam is movably mounted on the vertical column along the Z-axis, and the Z-axis driving device drives the longitudinal beam to move in the Z-axis direction;

[0011] and a beam assembly comprising a beam and an X-axis driving device correspondingly mounted on the beam, the beam is movably mounted on the stringer along the Y-axis, and the Y-axis driving device drives the beam to move in the Y-axis direction; Mounted on the beam along the X axis, the X-axis drive drives the printhead to move in the X-axis direction. [0012] Further, the 3D printer further includes a controller electrically connected to the X-axis driving device, the Y-axis driving device and the Z-axis driving device, respectively, and the controller is configured to control the X-axis driving device, the Y-axis driving device and the Z-axis The drive unit drives the print head to move the print.

[0013] Further, the 3D printer further includes a weighting device, the weighting device is installed on the longitudinal beam, the weighting device is a counterweight hydraulic cylinder, the weighting hydraulic cylinder is electrically connected with the controller, and the controller controls the weighting hydraulic cylinder. The weight of the 吋 makes the stringer always horizontally balanced.

[0014] Further, the 3D printer further includes a pressure sensor installed at both ends of the longitudinal beam for detecting a pressure signal at both ends of the longitudinal beam; the pressure sensor is electrically connected to the controller, and the controller is configured to acquire a pressure signal according to the pressure The signal controls the weight of the counterweight.

[0015] Further, the X-axis driving device, the Y-axis driving device and the Z-axis driving device respectively comprise a motor, a screw rod, a ball nut, a guide rail and a slider, the motor is connected with the ball nut, the ball nut is mounted on the screw rod, and is sliding The block is mounted on the rail.

[0016] Further, an auxiliary Z-axis assembly is further disposed on the beam, and the print head is mounted on the X-axis driving device through the auxiliary Z-axis assembly, and the print head is further movable along the z-axis in the beam.

[0017] According to the 3D printer of the above embodiment, since the stringer assembly and the beam assembly are mounted on the column assembly, and the column assembly is provided with a Z-axis driving device; the print head is mounted on the beam, the center of gravity of the print head and the beam assembly The center of gravity is very close, and the print head moves only a short distance in the z-axis direction, so that the stringer assembly and the beam assembly drive the print head with high acceleration printing, and the print head hardly oscillates, that is, the stable print head can achieve high-precision printing. The same column assembly drives the printhead to move in the z-axis direction, enabling the printhead to print very high products.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a 3D printer in an embodiment;

2 is a block diagram showing the structure of a 3D printer in an embodiment.

[0022]

DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] In the embodiment of the present invention, a 3D printer is provided, and the Z-axis direction of the driving frame can be stably and slowly moved. The X-axis and Y-axis can be moved at high speed and stable to meet the needs of 3D printers. This drive frame can also be used on other devices.

As shown in FIG. 1, the 3D printer mainly includes a column assembly 1, a stringer assembly 2, and a beam assembly 3. The column assembly 1 can be mounted on the machine chassis, the stringer assembly 2 is mounted on the column assembly 1, and the beam assembly 3 is mounted on the stringer assembly 2. The specific structure and installation relationship of the column assembly 1, the longitudinal beam assembly 2 and the beam assembly 3 are as follows:

[0027] Preferably, the column assembly 1 comprises four matrix-distributed columns 11 and a boring shaft driving device 12, four columns 11 are vertically arranged, the lower ends of the four columns 11 are fixed together by a chassis, and the four columns 11 form a square. Distributed, a column drive unit 12 is mounted on each column 11. The cymbal drive device 12 includes a motor, a lead screw, a guide rail and a slider. The motor is mounted on the upper end of the column 11 through a mounting seat, and the output shaft of the motor is vertically arranged downward, and the screw rod is fixed on the output shaft of the motor, the screw rod and the column parallel. The guide rail is fixed to the column 1 1 by screws, and the guide rail is arranged in parallel with the screw. The longitudinal beam 21 is provided with a threaded hole, and the longitudinal beam 21 is connected to the transmission nut on the screw shaft through a threaded hole, and the sliding block is slidably connected to the guide rail. The sliders of the x-axis drive unit 12 on the four columns 11 are moved in the direction of the x-axis. In other embodiments, the column assembly 1 may include six or more matrix-distributed columns 11 to increase the load carrying capacity of the column assembly 1 or an unlimited increase in travel.

[0028] The longitudinal beam assembly 2 comprises two parallel longitudinal beams 21 and a boring shaft drive 22, the two ends of which are respectively fixedly mounted on the sliding block of the boring shaft driving device 12, and the two longitudinal beams 21 are respectively mounted on The four x-axis drive units 12 are on the slider and the two longitudinal beams 21 are in horizontal and parallel positions. The stringer 21 can also be of unitary construction with the slider of the ram drive unit 12, or the stringer 21 can be fixedly mounted to the slider of the cymbal drive unit 12 via the mount. The cymbal drive device 22 includes a motor, a lead screw, a ball nut, a guide rail and a slider. The lead screw and the guide rail are fixedly mounted on the longitudinal beam 21, and the ball nut is rotatably mounted on the beam 31, and the slider is fixedly mounted on the beam 31. The ball nut is rotatably mounted on the screw rod, the slider is slidably mounted on the guide rail, the motor is mounted on the beam 31, the motor is coupled to the ball nut, and the motor drives the ball nut to rotate, so that the ball nut drives the beam 31 along the crucible Move in the direction of the axis.

The beam assembly 3 includes a beam 31 and an X-axis driving device 32. Both ends of the beam 31 are fixedly mounted on the slider of the boring drive unit 22, and the beam 31 is perpendicular to the stringer 21. The X-axis driving device 32 includes a motor, a screw rod, a ball nut, a guide rail and a slider. The screw rod is fixedly mounted on the beam 31. The lead screw is parallel to the beam 31. A small timing pulley is mounted on the output shaft of the motor. A concentric large pulley is also fixed on the ball nut at the corresponding position, and the large pulley is rotatably mounted on the beam 31, and the two pulleys are synchronized The belt is connected, the motor drives the large pulley to rotate by the small pulley, and the large pulley drives the mounting of the print head 4 to move along the X-axis direction. The print head 4 is mounted on the slider of the X-axis driving device 32 through a mounting seat. The print head 4 is located on one side of the beam 31 or on both sides of the beam 31. The center of gravity of the print head 4 and the center of gravity of the beam 31 are provided. At the same height in the Z-axis direction, or with a small height difference. In other embodiments, a plurality of beam assemblies 3 are mounted on the stringers 2, and a plurality of beam heads 3 are mounted on the plurality of beam assemblies 3 such that the 3D printer can achieve efficient printing of multiple printheads.

[0030] In other embodiments, the X-axis driving device 32, the Y-axis driving device 22, and the Z-axis driving device 12 are provided with limiting blocks at both ends of the slider, and the limiting block protects the device to prevent the moving process. The impact is formed on the fixing members at both ends.

[0031] In order to realize automatic control, as shown in FIG. 2, the 3D printer further includes a controller 5 electrically connected to the X-axis driving device 32, the Y-axis driving device 22 and the Z-axis driving device 12, respectively. 5 is used to control the X-axis driving device 32, the Y-axis driving device 22, and the Z-axis driving device 12 to drive the print head to move the printing in the X, Y, and Z directions.

[0032] Since the movement in the Z-axis direction needs to drive a large load, in order to improve the smoothness of the movement in the Z-axis direction, the 3D printer further includes four weight devices 6, and the four weight devices 6 are respectively installed in two At both ends of the longitudinal beam 21, the two weighting devices 6 perform dynamic supporting force arrangement on one longitudinal beam 21, so that the beam assembly 3 on the longitudinal beam 21 can be kept in the force balance and position level state. , to ensure the accuracy of printing. The counterweight device 6 is a counterweight hydraulic cylinder, and the counterweight hydraulic cylinder is electrically connected to the controller 5. The controller 5 controls each pair of counterweight hydraulic cylinders against the longitudinal beam according to the information of the actual movement position changes of the beam 31 and the print head 4. 21 different parts output the corresponding weight to carry out the counterweight, thereby ensuring that the tension beam 21 maintains the force balance and the position level in any state.

[0033] In order to further improve the automatic configuration of the weight device 6, a pressure sensor 7 is provided at both ends of the longitudinal beam 21, and the pressure sensor 7 is used for detecting the pressure across the longitudinal beam 21 and outputting a corresponding pressure signal; the pressure sensor 7 and The controller 5 is connected, the controller 5 acquires a pressure signal, and controls the weighting device 6 to perform weighting on the longitudinal beam 21 according to the pressure signal, thereby reducing the error of the weighting based on the position of the beam 31 and the print head 4, The beam 21 is less deformed by force, further ensuring printing accuracy.

[0034] In other embodiments, an auxiliary Z-axis assembly is further provided on the beam assembly 3, and the print head 4 is mounted on the X-axis driving device 32 of the beam assembly 3 by the auxiliary Z-axis assembly such that the print head 4 is on the beam 31. Can be along the Z axis Move in direction. The print head 4 is capable of self-moving printing on the Z in a small range, reducing the frequency of movement of the entire stringer 21, and making the overall average printing speed higher.

[0035] The 3D printer provided in this embodiment is mounted on a column assembly 1 having a plurality of columns, and the column assembly 1 is provided with a Z-axis driving device 12, and the printing head 4 is mounted on the beam. 31, the center of gravity of the print head 4 is very close to the center of gravity of the beam assembly 3, and the print head 4 is only moved a short distance in the Z-axis direction, so that the stringer assembly 2 and the beam assembly 3 drive the print head 4 with high acceleration prints, The print head 4 hardly oscillates, that is, the stable print head 4 can realize high-precision printing, and the column assembly 1 drives the print head 4 to perform long-distance movement in the Z-axis direction, so that the short-moving print head 4 can reduce oscillation. Printing high-precision products, the Z-axis long-distance movement of multiple columns makes it possible to print high-quality products. And because the modularization of the column and the longitudinal beam can be infinitely spliced, the stroke length in the Y-axis direction can be extended indefinitely.

The present invention has been described with reference to the specific examples thereof, which are merely used to help the understanding of the invention and are not intended to limit the invention. For the person skilled in the art to which the invention pertains, several simple derivations, variations or substitutions can be made in accordance with the inventive concept.

technical problem

Problem solution

Advantageous effects of the invention

Claims

Claim

[Claim 1] A 3D printer comprising a drive holder and a printhead (4), wherein the drive frame comprises:

a column assembly (1) comprising a column (11) and a Z-axis driving device (12) correspondingly mounted on the column (11);

a stringer assembly (2) comprising a stringer (21) and a Y-axis drive (22) correspondingly mounted on the stringer (21); the stringer (21) is movably mounted along the Z-axis On the column (11), the Z-axis driving device (12) drives the longitudinal beam (21) to move in the Z-axis direction;

And a beam assembly (3) comprising a beam (31) and an X-axis driving device (32) correspondingly mounted on the beam (31), the beam (31) being movably mounted along the Y-axis in the longitudinal direction On the beam (21), the Y-axis driving device (22) drives the beam (31) to move in the Y-axis direction; the print head (4) is movably mounted on the beam (31) along the X-axis The X-axis driving device (32) drives the print head (4) to move in the X-axis direction.

[Claim 2] The 3D printer of claim 1, further comprising a controller (5),

The controller (5) is electrically connected to the X-axis driving device (32), the Y-axis driving device (22) and the Z-axis driving device (12), respectively, and the controller (5) is used for controlling the X The shaft drive (32), Y-axis drive (22) and Z-axis drive (12) drive the print head (4) for mobile printing.

[Claim 3] The 3D printer according to claim 2, further comprising a weight device (6)

The weight (6) is mounted on the longitudinal beam (21), the weight device (6) is a counterweight hydraulic cylinder, and the counterweight hydraulic cylinder is electrically connected to the controller (5) The controller (5) controls the weight of the counterweight hydraulic cylinder so that the stringer (21) is always horizontally balanced.

[Claim 4] The 3D printer of claim 3, further comprising a pressure sensor (7)

The pressure sensor (7) is mounted at both ends of the longitudinal beam (21) for detecting a pressure signal at both ends of the longitudinal beam (21); the pressure sensor (7) and the controller (5) Electrically connected, the controller (5) is configured to acquire the pressure signal, and according to the The pressure signal controls the weight of the counterweight (6).

[Claim 5] The 3D printer according to claim 4, wherein the X-axis driving device (32)

The Y-axis driving device (22) and the Z-axis driving device (12) each include a motor, a lead screw, a ball nut, a guide rail and a slider, and the motor is coupled to the ball nut, and the ball nut is mounted on the screw Above, the slider is mounted on the rail.

[Claim 6] The 3D printer according to claim 5, wherein the beam (31) is further provided with an auxiliary Z-axis assembly, and the print head (4) is mounted on the auxiliary Z-axis assembly Said

The X-axis driving device (32) is such that the print head (4) is movable along the Z-axis at the beam (31).