Gantry type metal additive printing device with a subsidence workbench

Abstract

The present invention proposes a gantry-type metal additive printing device with a sinking workbench, including a frame, a gantry, a printing gun head and a workbench, the frame is provided with two parallel guide rails, the gantry is arranged on the guide rails and can move on the guide rails, the printing gun head is arranged on the gantry and can move on the gantry; the frame includes a base and a first pillar and a second pillar arranged on both sides of the base, the inner sides of the first pillar and the second pillar are respectively provided with a lifting screw, and the lifting screw is provided with a slider fixed to the workbench; after the printing gun head prints a layer on the printed workpiece, the lifting screw is driven to rotate by controlling the driving motor to make the workbench drop by a printing thickness. The present invention can make the workbench drop as the height of the printed product increases, and always keep the printing surface at a set height, which is not only convenient for the operator to operate, but also convenient for cleaning waste residue.

Description

Technical Field

[0001] The present invention relates to the technical field of metal additive equipment, and in particular to a gantry-type metal additive printing device with a settling workbench. Background Art

[0002] Additive manufacturing technology (also known as "3D printing") is a method based on computer three-dimensional CAD models that directly manufactures three-dimensional physical entities in a layer-by-layer stacking manner. Additive manufacturing technology can quickly and accurately manufacture parts of any complex shape and structure on a single device, thereby achieving "free manufacturing"; these technologies are aimed at high-end manufacturing fields such as aerospace, weapons manufacturing, automobiles, molds, and biomedicine, and can directly manufacture three-dimensional complex structures to solve problems that are difficult or even impossible to process with traditional manufacturing processes.

[0003] However, when performing metal additive manufacturing, the workbench in the metal additive printing device is generally fixed. As the height of the printed product increases, the print gun head also needs to be adjusted higher. This causes the print gun head to have a long stroke, the center of gravity to increase, and the rigidity to decrease, affecting product quality. In addition, the increase in printing height is not conducive to the operator to clean up the waste residue on the workbench, which is very troublesome. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a gantry-type metal additive printing device with a sinking workbench, which can allow the workbench to descend as the height of the printed product increases, and always keep the printing surface at a set height, which is not only convenient for operators to operate, but also convenient for cleaning waste residue.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A gantry-type metal additive printing device with a settling workbench comprises a frame, a gantry, a printing gun head and a workbench, wherein the frame is provided with two parallel guide rails, the gantry is arranged on the guide rails and can move on the guide rails, and the printing gun head is arranged on the gantry and can move on the gantry; the frame comprises a base and a first pillar and a second pillar arranged on both sides of the base, a lifting screw rod is respectively arranged on the inner side of the first pillar and the second pillar, and a slider fixed to the workbench is arranged on the lifting screw rod; after the printing gun head prints a layer on the metal additive material, the lifting screw rod is driven to rotate by controlling a driving motor so that the workbench is lowered by one printing thickness.

[0007] Furthermore, guide holes are respectively provided at the four corners of the workbench, and guide pillars are respectively provided on the inner sides of the first pillar and the second pillar. The guide pillars pass through the guide holes to provide guidance when the workbench is raised or lowered.

[0008] Furthermore, there are two lifting screws, which are respectively arranged on the inner sides of the first pillar and the second pillar; driven bevel gears are respectively arranged at the bottom of the lifting screws; the driving motor is arranged on the base, and the driving motor drives the active bevel gear that meshes with the driven bevel gears respectively arranged at the bottom of the lifting screw to rotate, thereby rotating the lifting screw.

[0009] Furthermore, it also includes a cooling mechanism, which includes a cooling water tank and a spray pipe, the cooling water tank is seal-welded to the bottom of the workbench, and the spray pipe is fixed in the cooling water tank; the spray pipe adopts a three-way structure, and a plurality of spray holes are evenly arranged on the spray pipe, and the spray holes face the workbench; the cooling water tank is provided with a water outlet connected to an external water tank; one end of the spray pipe is connected to the external water tank, and the other two ends are sealed; under the action of water pressure, water in the external water tank enters the spray pipe, and is sprayed from the spray hole to the bottom of the workbench to cool it down.

[0010] Furthermore, a reinforcing steel plate is provided inside the cooling water tank, and the spray pipe is fixed in the cooling water tank through the reinforcing steel plate.

[0011] Furthermore, the reinforcing steel plates are evenly distributed in the cooling water tank, so that the cooling water tank is divided into nine squares; through holes are respectively provided on the reinforcing steel plates, so that water in the nine squares can flow mutually.

[0012] Furthermore, the spray pipes are evenly distributed in the cooling water tank.

[0013] Furthermore, the spray pipes are distributed in the cooling water tank in a U-shape.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention arranges a sinking workbench on the frame and controls the operation of the driving motor so that after the print gun head prints a layer or a path on the printed workpiece, the workbench can automatically descend by a printing thickness, so that the printed workpiece plane is always kept consistent with the initial printing plane height, which is not only beneficial to the operator's operation, but also convenient for cleaning waste residue.

[0015] Since the printed workpiece plane is always at the same height as the initial printing plane during the printing process, the need to raise the print gun head is avoided, so that the center of gravity of the print gun head is always at the initial position or a lower position, thereby increasing the service life of the print gun head.

[0016] The present invention also provides a water-cooled cooling mechanism under the workbench to improve the cooling effect of the workbench. Specifically, the cooling mechanism includes a cooling water tank and a spray pipe. The spray pipe is provided in the cooling water tank, and the spray hole on the spray pipe faces the workbench. After the water in the external water tank enters the spray pipe, it will be sprayed out from the spray hole under the action of water pressure and directly sprayed to the bottom of the workbench; the heat generated during the printing process will be transferred to the workbench, and the water sprayed on the workbench will take away the heat of the workbench, thereby achieving a cooling effect. The heat of the workbench is taken away by water cooling, which improves the cooling effect of the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of a gantry-type metal additive printing device with a settling workbench of the present invention;

[0019] Figure 2 It is a structural diagram of the rack from the first perspective;

[0020] Figure 3 for Figure 2 A magnified view of AA in ;

[0021] Figure 4 This is a schematic diagram of the result from the second perspective of the rack;

[0022] Figure 5 Figure 4 A magnified image of the BB in ;

[0023] Figure 6 It is a structural schematic diagram of the cooling mechanism;

[0024] Figure 7 is a schematic diagram of the cross-sectional structure of the cooling mechanism;

[0025] Figure 8 It is a schematic diagram of the structure of the spray pipe;

[0026] Fig. 9 It is a perspective structural diagram of the cooling mechanism.

[0027] Figure symbols: 1 frame; 101 first pillar; 102 second pillar; 103 base; 2 gantry; 3 printing gun head; 4 workbench; 401 guide hole; 5 guide rail; 6 lifting screw; 601 slider; 602 driven bevel gear; 603 driving bevel gear; 604 transmission rod; 7 driving motor; 8 guide column; 9 cooling mechanism; 901 cooling water tank; 9011 water outlet; 902 spray pipe; 9021 spray hole; 903 reinforcing steel plate; 9031 through hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 1-Figure 5The embodiment of the present invention discloses a gantry-type metal additive printing device with a settling workbench, including a frame 1, a gantry 2, a printing gun head 3 and a workbench 4, the frame 1 is provided with two parallel guide rails 5, the gantry 2 is arranged on the guide rails 5 and can move on the guide rails 5, and the printing gun head 3 is arranged on the gantry 2 and can move on the gantry 2; the frame 1 includes a base 103 and a first pillar 101 and a second pillar 102 arranged on both sides of the base 103, the inner sides of the first pillar 101 and the second pillar 102 are respectively provided with a lifting screw 6, and the lifting screw 6 is provided with a slider 601 fixed to the workbench 4; after the printing gun head 3 prints a layer (pass) on the printing workpiece, the lifting screw 6 is driven to rotate by controlling the driving motor 7 to thereby lower the workbench 4 by a printing thickness. Among them, by controlling the gantry 2 to move on the guide rail 5, the print gun head 3 can be moved on the Y axis of the workbench 4; by controlling the print gun head 3 to move horizontally on the gantry 2, the print gun head 3 can be moved on the X axis of the workbench 4.

[0032] In the embodiment of the present invention, the printing workpiece is placed on the workbench 4, and the gantry 2 drives the printing gun head 3 to print on the printing workpiece. After each layer (track) is printed on the printing workpiece, the workbench 4 is automatically lowered by a printing thickness by controlling the rotation of the lifting screw 6, so that the printing workpiece plane is always kept consistent with the initial printing plane height; when printing the next layer (track) on the printing workpiece, the printing gun head 3 does not need to be raised to print on the printing workpiece, so that the center of gravity of the printing gun head 3 remains unchanged, which is not only convenient for the operator to operate, but also convenient for manual cleaning of waste residues, which is very convenient.

[0033] Among them, Figure 2 and Figure 4 As shown, there are two lifting screw rods 6, which are respectively arranged on the inner side of the first pillar 101 and the second pillar 102. Slide blocks 601 are provided on the two lifting screw rods 6. The two sides of the workbench 4 are respectively fixed to the slide blocks 601. The two lifting screw rods 6 are driven to rotate by the driving motor 7, thereby realizing the adjustment of the workbench 4 to rise and fall.

[0034] Specifically, Figure 3 and Figure 5 As shown, a driving motor 7 and a transmission rod 604 are arranged on the base, and active bevel gears 603 meshing with the driven bevel gear 602 are arranged at both ends of the transmission rod 604. The driving motor 7 drives the transmission rod to rotate, so that the active bevel gear 603 drives the driven bevel gear 602 to rotate, so that the lifting screw 6 drives the slider 601 to rise or fall, and finally the workbench 4 can be raised or lowered.

[0035] Further, such as Figure 1 and Figure 7As shown, guide holes 401 are respectively provided at the four corners of the workbench 4, and guide columns 8 are respectively provided on the inner sides of the first pillar 101 and the second pillar 102, and the guide columns 8 pass through the guide holes 401 respectively; when the driving motor 7 drives the workbench 4 to rise and fall, the four corners of the workbench 4 are guided by the guide columns 8.

[0036] Further, such as Figure 6-Figure 9 As shown, the gantry-type metal additive printing device with a settling workbench in the embodiment of the present invention further includes a cooling mechanism 9, the cooling mechanism 9 includes a cooling water tank 901 and a spray pipe 902, the cooling water tank 901 is sealed and welded to the bottom of the workbench 4, and the spray pipe 902 is fixed in the cooling water tank 901; Figure 8 As shown, the spray pipe 902 adopts a three-way structure, and a plurality of spray holes 9021 are evenly arranged on the spray pipe 902, and the spray holes 9021 face the workbench 4, so that when water is sprayed out from the spray holes 9021, it can be sprayed toward the workbench 4; a water outlet 9011 connected to an external water tank is provided on the cooling water tank 901; one end of the spray pipe 902 is connected to the external water tank, and the other end is sealed; under the action of water pressure (such as a water pump), the water in the external water tank enters the spray pipe 902, and is sprayed from the spray holes 9021 toward the bottom of the workbench 4 to cool it down.

[0037] In the embodiment of the present invention, since the water inlet of the spray pipe 902 is connected to the external water tank, and the water outlet of the spray pipe 902 is the spray hole 9021 set on the spray pipe 902, therefore, under the action of water pressure, after the water in the external water tank enters the spray pipe 902, it will be directly sprayed to the bottom of the workbench 4 through the spray hole 9021; and since metal additive manufacturing is carried out on the workbench 4, when metal additive manufacturing is carried out, the heat generated during the printing process will be transferred to the workbench 4, and the water sprayed on the bottom of the workbench 4 will take away the heat of the workbench 4, thereby achieving a cooling effect.

[0038] The water sprayed onto the workbench 4 will automatically flow directly into the cooling water tank 901 , and will flow into the external water tank through the water outlet 9011 provided on the cooling water tank 901 .

[0039] Furthermore, a reinforcing steel plate 903 is provided inside the cooling water tank 901, and the spray pipe 902 is fixed inside the cooling water tank 901 through the reinforcing steel plate 903 to stabilize the spray pipe 902. Specifically, the reinforcing steel plates 903 are evenly distributed inside the cooling water tank 901, so that the cooling water tank 901 is divided into nine squares, and then the spray pipes 902 are respectively penetrated by the reinforcing steel plates 903, which not only improves the stability of the cooling water tank 901, but also better fixes the spray pipe 902 to prevent the spray pipe 902 from loosening when the water in the spray pipe 902 is sprayed from the spray hole 9021; through holes 9031 are respectively provided on the reinforcing steel plates 903, so that the water in the nine squares can circulate mutually, so that the water in the cooling water tank 901 can flow from the water outlet 9011 to the external water tank.

[0040] Furthermore, the through hole 9031 is provided at the bottom of the cooling water tank 901, and the water outlet 9011 is provided at the bottom of the cooling water tank 901. By providing the through hole 9031 on the reinforcing steel plate 903, and the through hole 9031 is located at the bottom of the cooling water tank 901, it is ensured that all the water in the cooling water tank 901 can flow from the water outlet 9011 to the external water tank.

[0041] In the embodiment of the present invention, the spray pipes 902 are evenly distributed in the cooling water tank 901 , so that the water sprayed toward the workbench 4 is evenly distributed, thereby better dissipating the heat for the workbench 4 .

[0042] Specifically, Fig. 9 As shown, the spray pipe 902 is distributed in the cooling water tank 901 in a U-shaped shape. By running the spray pipe 902 around and in the center of the workbench 4, the water sprayed to the workbench 4 is evenly distributed, thereby achieving a better cooling effect.

[0043] In summary, the present invention arranges a sinking workbench 4 on the frame 1 and controls the operation of the driving motor 7 so that after the print gun head 3 prints a layer (pass) on the print workpiece, the workbench 4 can automatically descend by a printing thickness, so that the print workpiece plane is always kept consistent with the initial print plane height, which is not only beneficial to the operator's operation, but also convenient for cleaning waste residue.

[0044] Since the printed workpiece plane of the present invention keeps the same height as the initial printing plane during the printing process, the need to raise the print gun head 3 is avoided, so that the center of gravity of the print gun head 3 is always at the initial position or a lower position, thereby increasing the service life of the print gun head 3.

[0045] In addition, a water-cooled cooling mechanism 9 is provided below the workbench 4, and the heat of the workbench 4 is removed by water cooling, thereby improving the cooling effect of the workbench 4. Specifically, by providing a cooling water tank 901 below the workbench 4, by providing a spray pipe 902 in the cooling water tank 901, and with the spray hole 9021 on the spray pipe 902 facing the workbench 4, after the water in the external water tank enters the spray pipe 902, it will be sprayed out from the spray hole 9021 under the action of water pressure, and directly sprayed to the bottom of the workbench 4, thereby removing the heat of the workbench 4 and achieving a cooling effect.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gantry-type metal additive printing device with a settling workbench, comprising a frame, a gantry, a printing gun head and a workbench, characterized in that: The frame is provided with two parallel guide rails, the gantry is arranged on the guide rails and can move on the guide rails, and the printing gun head is arranged on the gantry and can move on the gantry; the frame comprises a base and a first pillar and a second pillar arranged on both sides of the base, the inner sides of the first pillar and the second pillar are respectively provided with a lifting screw rod, and the lifting screw rod is provided with a slider fixed to the workbench; after the printing gun head prints a layer on the printing workpiece, the lifting screw rod is driven to rotate by controlling the driving motor to make the workbench drop by a printing thickness; there are two lifting screw rods, which are respectively arranged on the inner sides of the first pillar and the second pillar; the bottom of the lifting screw rod is respectively provided with a driven bevel gear; the driving motor is arranged on the base, and the driving motor rotates by driving the active bevel gear meshed with the driven bevel gears respectively arranged at the bottom of the lifting screw rod, so as to rotate the lifting screw rod; It also includes a cooling mechanism, which includes a cooling water tank and a spray pipe. The cooling water tank is sealed and welded to the bottom of the workbench, and the spray pipe is fixed in the cooling water tank. The spray pipe adopts a three-way structure, and a plurality of spray holes are evenly arranged on the spray pipe, and the spray holes face the workbench. The cooling water tank is provided with a water outlet connected to an external water tank. One end of the spray pipe is connected to the external water tank, and the other two ends are sealed. Under the action of water pressure, water in the external water tank enters the spray pipe and is sprayed from the spray holes to the bottom of the workbench to reduce the temperature. A reinforcing steel plate is provided inside the cooling water tank, and the spray pipe is fixed in the cooling water tank through the reinforcing steel plate; the reinforcing steel plates are evenly distributed in the cooling water tank, so that the cooling water tank is divided into nine squares; through holes are respectively provided on the reinforcing steel plates, so that water in the nine squares can flow mutually.

2. The gantry-type metal additive printing device with a settling workbench according to claim 1, characterized in that: Guide holes are respectively arranged at the four corners of the workbench, and guide pillars are respectively arranged on the inner sides of the first pillar and the second pillar. The guide pillars pass through the guide holes to provide guidance when the workbench is raised or lowered.

3. The gantry-type metal additive printing device with a settling workbench according to claim 1, characterized in that: The spray pipes are evenly distributed in the cooling water tank.

4. The gantry-type metal additive printing device with a settling workbench according to claim 1, characterized in that: The spray pipes are distributed in the cooling water tank in a U-shaped manner.

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