Double-gantry double-arc metal rapid forming machine

Abstract

The utility model discloses a double-gantry and double-arc rapid metal forming machine, and belongs to the technical field of arc additive manufacturing. The double-gantry double-arc metal rapid forming machine comprises a workbench and a gantry ram, a gantry frame is fixedly installed at the top of the gantry ram, a ram front-back movement mechanism is fixedly installed at the bottom of the gantry ram, and the end, close to the workbench, of the gantry frame is connected with a cross beam by arranging a cross beam up-down movement mechanism; the end, close to the workbench, of the cross beam is fixedly connected with a flange left-right movement track, the flange left-right movement track is connected with an electric arc additive manufacturing machining head connecting flange by arranging a flange left-right movement mechanism, and the end, close to the workbench, of the cross beam is fixedly provided with a right-angle speed reducer. The utility model is used for solving the problem that the prior art is constrained by conditions such as the size of a large integrally-formed part and the rapid metal forming efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of arc additive manufacturing, in particular to a double-gantry double-arc metal rapid prototyping machine. Background Art

[0002] The rapid development of aerospace and weapons and equipment towards supersonic / hypersonic speeds has led to tremendous changes in the service environment. Structural parts are subjected to more severe tests such as ultra-high temperatures, ultra-high stresses, extreme friction damage, drastic temperature changes, and dynamic loads, which puts extremely high demands on the anti-friction, anti-vibration, anti-thermal deformation, and high temperature resistance of structural parts. High quality and harsh environments urgently require that structural parts can integrate multiple functions, have stronger structural integrity, and be more lightweight. Therefore, the development of an integrated structure with structural-functional integration is the key to improving the performance of weapons and equipment in the future.

[0003] Additive manufacturing technology is an effective way to achieve product structural and functional integration, but it is still limited by the size of large integral molded parts, metal rapid prototyping efficiency and other conditions. At present, metal additive manufacturing technology can be divided into laser additive manufacturing, arc additive manufacturing and electron beam additive manufacturing according to the heat source. Among them, the additive manufacturing technology with laser as the heat source has high forming accuracy but low forming efficiency; electron beam additive manufacturing technology needs to be carried out in a vacuum environment and has relatively strict requirements on the production environment; while arc additive manufacturing technology has the characteristics of high forming efficiency, wide range of applicable material grades and low production cost, and has been maturely applied to the rapid manufacturing of metal parts.

[0004] However, the current development of metal rapid prototyping technology is mainly constrained by conditions such as the size of large integral molded parts and the efficiency of metal rapid prototyping. Therefore, there is an urgent need for a metal rapid prototyping machine with ultra-large molding size, high molding efficiency and high precision to meet this demand. Utility Model Content

[0005] The utility model aims to solve the problem that the existing technology is restricted by the size of large integral molding parts, metal rapid molding efficiency and other conditions. To this end, the utility model proposes a double-gantry double-arc metal rapid molding machine, which can have the effects of super large molding size, high molding efficiency and high precision.

[0006] A double-gantry double-arc metal rapid prototyping machine comprises a workbench and a gantry slide, a gantry frame is fixedly mounted on the top of the gantry slide, a ram forward and backward movement mechanism is fixedly mounted on the bottom of the gantry slide, an end of the gantry frame close to the workbench is connected to a beam by arranging a beam up and down movement mechanism, an end of the beam close to the workbench is fixedly connected to a flange left and right movement track, an arc additive manufacturing processing head connecting flange is connected to the flange left and right movement mechanism on the flange left and right movement track, a right-angle reducer is fixedly mounted on the end of the beam close to the workbench, an arc additive manufacturing processing head, an arc additive manufacturing power supply, an arc additive manufacturing wire feeding mechanism, an arc additive manufacturing water and gas system and an arc additive manufacturing control system are fixedly mounted on the end of the arc additive manufacturing processing head connecting flange close to the workbench, and an inert gas cabin is arranged on the outside of the workbench.

[0007] Furthermore, two groups of gantries are provided, and the two groups of gantries are symmetrically distributed about the central axis of the workbench.

[0008] Furthermore, a deceleration mechanism is arranged on the side of the workbench; the deceleration mechanism comprises a gear rod, the side of the gantry slide is rotatably connected with a gear, the side of the gear is fixedly connected with a transmission rod, the side of the transmission rod is fixedly connected with a hydraulic warehouse, the inner wall of the hydraulic warehouse is slidably connected with a push plate by setting an elastic rod piston, the end of the hydraulic warehouse away from the push plate is slidably connected with a pressure plate by a piston, and the outer side of the pressure plate is fixedly connected with a rubber block.

[0009] Furthermore, the gear rod is located at the top of the workbench, and the gear rod and the workbench are in a fixed state, so that the gear rod is in a stationary state.

[0010] Furthermore, the gear is located at the top of the gear rod, and the gear is in meshing with the gear rod, so that the gear rotates while moving on the gear rod.

[0011] Furthermore, three pressing plates are provided, and the three pressing plates are distributed in a circular row about the transmission rod.

[0012] The difference from the prior art is that the beneficial effects of this application are:

[0013] (1) The dual-gantry dual-arc metal rapid prototyping machine can significantly improve the molding efficiency of dual-arc collaborative metal rapid prototyping compared to traditional single-heat source additive manufacturing. According to the process characteristics of arc additive manufacturing, the dual-arc collaborative additive manufacturing technology will greatly shorten the manufacturing cycle of large metal parts. In conjunction with the dual-arc additive manufacturing path planning software, it will realize intelligent partitioning, slicing and path planning, effectively avoid the interference problem of the dual-arc additive manufacturing processing head, significantly improve the efficiency of additive manufacturing, and reduce production costs; the dual-gantry dual-arc metal rapid prototyping technology will obtain an ultra-large forming size. The dual-gantry mechanical body structure and the workbench constitute a regular cubic metal forming area. Under the condition of ensuring large-size forming, the moving beam and moving column structure meets the maximum utilization of the internal space of the sealed box, greatly reducing the consumption of inert gas and gas purification time of the sealed box, and further reducing the cost of metal rapid prototyping; high-precision gear rack transmission is used in the front and rear motion mechanisms of the two sets of slides and the left and right motion mechanisms of the arc additive manufacturing processing head connecting flange, avoiding the influence of the large-stroke ball screw on the transmission accuracy due to its own drooping due to the horizontal placement of the ball screw. The up and down movement mechanism of the crossbeam adopts a single servo motor input and two ball screws with synchronous output drive mode. Combined with the high transmission accuracy of the vertical placement of the screw, the high precision of the arc additive manufacturing processing head movement in the metal rapid prototyping process is achieved.

[0014] (2) The double-gantry double-arc metal rapid prototyping machine can drive the gear to move on the gear rod when the gantry slide moves. At this time, the gear rotates under the action of the gear rod. When the gantry slide moves too fast, the gear rotates too fast. With the help of the transmission rod, hydraulic bin, push plate, elastic rod, pressure plate and rubber block, friction deceleration can be performed, thereby improving the stability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] Figure 1 It is a schematic diagram of the overall appearance of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of a three-dimensional structure of the utility model in a half right-side and half top view;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the speed reduction mechanism of the utility model;

[0019] Figure 4 For the utility model Figure 3 Enlarged structural diagram at A in the middle.

[0020] In the figure:

[0021] 1. Workbench; 2. Gantry slide; 3. Slide forward and backward movement mechanism; 4. Flange left and right movement track; 5. Flange left and right movement mechanism; 6. Beam; 7. Gantry; 8. Beam up and down movement mechanism; 9. Right-angle reducer; 10. Arc additive manufacturing processing head; 11. Arc additive manufacturing processing head connecting flange; 12. Arc additive manufacturing power supply; 13. Arc additive manufacturing wire feeding mechanism; 14. Arc additive manufacturing water and gas system; 15. Arc additive manufacturing control system; 16. Inert gas cabin; 17. Gear rod; 18. Gear; 19. Transmission rod; 20. Hydraulic chamber; 21. Elastic rod; 22. Push plate; 23. Pressure plate; 24. Rubber block. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0024] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0026] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Embodiment 1

[0029] See also Figure 1-Figure 2 As shown in the figure, a double-gantry double-arc metal rapid prototyping machine includes a workbench 1 and a gantry ram 2. A gantry frame 7 is fixedly installed on the top of the gantry ram 2. The gantry frame 7 is provided with two groups. The two groups of gantry frames 7 are symmetrically distributed about the central axis of the workbench 1. A ram forward and backward motion mechanism 3 is fixedly installed on the bottom of the gantry ram 2. The end of the gantry frame 7 close to the workbench 1 is connected to the crossbeam 6 by setting a crossbeam up and down motion mechanism 8. The end of the crossbeam 6 close to the workbench 1 is fixedly connected to a flange left and right motion track 4. The flange left and right An arc additive manufacturing processing head connecting flange 11 is connected to the motion track 4 by setting a flange left-right motion mechanism 5, a right-angle reducer 9 is fixedly installed on the end of the crossbeam 6 close to the workbench 1, an arc additive manufacturing processing head 10, an arc additive manufacturing power supply 12, an arc additive manufacturing wire feeding mechanism 13, an arc additive manufacturing water and gas system 14 and an arc additive manufacturing control system 15 are fixedly installed on the end of the arc additive manufacturing processing head connecting flange 11 close to the workbench 1, and an inert gas cabin 16 is arranged on the outside of the workbench 1.

[0030] The main structure of the double gantry machinery includes an internal track and a movable workbench 1 arranged on the internal track, and also includes a movable beam and movable column type double gantry mechanical structure, which includes two parallel gantry slides 2, two gantries 7 arranged in parallel on the two gantry slides 2, a slide forward and backward movement mechanism 3 for driving the gantry 7 to move on the gantry slide 2, a crossbeam 6 arranged on each gantry 7, and a crossbeam up and down movement mechanism 8 for driving the crossbeam 6 to move up and down on the gantry 7.

[0031] The ram forward and backward motion mechanism 3 is guided by a linear guide rail, and the servo motor synchronously drives the reducer to decelerate, and then the gear rack is driven. There are four ram forward and backward motion mechanisms 3, which are divided into two groups, front and rear, and drive two gantries 7 respectively; the two groups of ram forward and backward motion mechanisms 3 share a set of gantry ram 2.

[0032] The two gantries 7 are connected to the front and rear two groups of gantry slide flange plates 2 to form a double-moving column gantry structure; the crossbeam 6 is connected through a crossbeam up and down movement mechanism 8, and moves up and down on the two gantries 7; the crossbeam up and down movement mechanism 8 is reduced by a servo motor through a "one-to-two" T-type double-output reducer, and the torque is transmitted by two transmission shafts, and then the output is reversed through two right-angle reducers 9 to the vertically installed ball screws on both sides of the gantry 7 as a drive, and a linear guide is used as a guide to realize the up and down movement of the crossbeam 6 on the gantry 7 to form a moving beam structure.

[0033] The movable workbench 1 is driven by a variable frequency motor and guided by track wheels, and can move back and forth between the inner track and the outer track.

[0034] The external track is composed of an H-shaped steel welded base frame and a light rail, and has strong structural rigidity.

[0035] The dynamic beam and dynamic column type double gantry mechanical structure includes a gantry ram 2, two groups of ram forward and backward motion mechanisms 3, two gantries 7, two crossbeams 6, two groups of crossbeam up and down motion mechanisms 8, two arc additive manufacturing processing head connection flanges 11, and two groups of flange left and right motion mechanisms 5. Specifically, there are two gantry rams 2, which are arranged in parallel on both sides of the gantry 7. The ram forward and backward motion mechanisms 3 are guided by high-precision linear guides. After the servo motor synchronously drives the reducer to reduce speed, the gear rack is driven. There are four ram forward and backward motion mechanisms 3, which are divided into two groups, front and back, and drive two gantries 7 respectively. The two groups of ram forward and backward motion mechanisms 3 share a set of gantry rams 2, and the total coverage range is 5 meters. The two gantries 7 are connected to the flange plates of the two groups of gantry rams 2, forming a dynamic column type double gantry structure. The crossbeams 6 are connected through the crossbeam up and down motion mechanism 8, and can move up and down on the two gantries 7. The beam up and down motion mechanism 8 is reduced by a servo motor through a "one-to-two" T-type dual-output reducer, and then the torque is transmitted by two transmission shafts, and then the two right-angle reducers 9 are used to output the vertically installed ball screws on both sides of the gantry 7 as a drive, and the linear guide is used as a guide to realize the up and down movement of the beam 6 on the gantry 7, forming a moving beam structure, and the up and down movement stroke is 1 meter. The arc additive manufacturing processing head connecting flange 11 moves left and right on the beam 6 through the flange left and right motion mechanism 5. The flange left and right motion mechanism 5 is guided by a linear guide, the servo motor drives the reducer to reduce the speed, and the gear rack is driven. The arc additive manufacturing processing head connecting flange 11 has a left and right movement stroke of 1 meter.

[0036] The arc additive manufacturing device includes an arc additive manufacturing processing head 10, an arc additive manufacturing power supply 12, an arc additive manufacturing wire feeder and other core devices.

[0037] The arc additive manufacturing processing head 10 is fixed on the arc additive manufacturing processing head connecting flange 11, and the arc additive manufacturing processing head connecting flange 11 is connected to the flange left and right motion mechanism 5. The flange left and right motion mechanism 5 is guided by a linear guide rail, the servo motor drives the reducer to reduce speed, and the gear rack is driven.

[0038] An arc additive manufacturing processing head 10 is connected to each crossbeam 6 through a flange left-right motion mechanism 5 , and the arc additive manufacturing processing head 10 moves along the XYZ direction on the moving beam and moving column type double gantry mechanical structure.

[0039] The dual arc additive manufacturing processing heads 10 are respectively arranged on the arc additive manufacturing connecting flanges on the two gantries 7, so that two groups of arcs can move simultaneously and independently along the XYZ directions, forming a dual arc collaborative additive manufacturing technology.

[0040] The inert gas cabin 16 includes a molded cabin and an inert gas circulation device. The molded cabin is composed of a rigid sealed cabin and a flexible sealed cabin, wherein the molded size of the rigid sealed cabin is 1*1*5m. When the size of the molded parts exceeds the molded size of the rigid sealed cabin, the flexible sealed cabin is used as an extended cabin. The inert gas circulation device includes a vacuum device and a gas circulation device. After the sealed cabin is closed, the vacuum device is first started to exhaust the air inside the cabin, and then the gas circulation device is started to fill in inert gas and circulate to remove water and oxygen in the cabin.

[0041] The gantry ram 2 is arranged parallel to the left and right sides of the gantry frame 7. The ram forward and backward motion mechanism 3 is driven by a servo motor to drive the reducer on the gantry ram 2, and the flange of the gantry ram 2 is driven forward and backward through gear rack transmission. The two gantries 7 are fastened to the flange plate of the gantry ram 2. The two sets of ram forward and backward motion mechanisms 3 drive the two gantries 7 to move forward and backward independently, forming a double-moving column gantry structure. The two crossbeams 6 are moved up and down on the two gantries 7 through two sets of crossbeam up and down motion mechanisms 8, forming a double-moving beam structure.

[0042] The arc additive manufacturing processing head connecting flange 11 moves left and right on the crossbeam 6 through the flange left and right motion mechanism 5. The flange left and right motion mechanism 5 is similar in structure to the ram front and back motion mechanism 3. Due to its large motion stroke, the horizontal placement of the lead screw will be affected by gravity droop and affect the accuracy. Therefore, both structures adopt linear guide rails and high-precision gear rack transmission to ensure the motion accuracy of the two arc additive manufacturing processing heads 10 in the front and back and left and right directions. The two arc additive manufacturing processing heads 10 are respectively fixedly mounted on the two arc additive manufacturing processing head connecting flanges 11, and realize relatively independent three-dimensional spatial motion along the XYZ direction through the double-moving beam and moving column gantry machine tool, that is, double arc.

[0043] When in use, the dual arc additive manufacturing processing head 10 is respectively arranged on the arc additive manufacturing connecting flanges on the two gantries 7, so that the two groups of arcs can move simultaneously and independently along the XYZ directions; the gantry slide 2 is arranged parallel to the left and right sides of the gantry 7, and the slide forward and backward movement mechanism 3 is driven by a servo motor to drive the reducer on the gantry slide 2, and the flange of the gantry slide 2 is realized through gear rack transmission. The arc additive manufacturing processing head connecting flange 11 moves left and right on the beam 6 through the flange left and right movement mechanism 5.

[0044] To improve the stability of the device, please refer to Figure 1-Figure 4 As shown in the figure, a reduction mechanism is arranged on the side of the workbench 1; the reduction mechanism comprises a gear rod 17, a gear 18 is rotatably connected to the side of the gantry slide 2, a transmission rod 19 is fixedly connected to the side of the gear 18, a hydraulic bin 20 is fixedly connected to the side of the transmission rod 19, an inner wall of the hydraulic bin 20 is piston-slidingly connected to a push plate 22 by setting an elastic rod 21, an end of the hydraulic bin 20 away from the push plate 22 is piston-slidingly connected to a pressure plate 23, and a rubber block 24 is fixedly connected to the outer side of the pressure plate 23.

[0045] During use, when the gantry slide 2 moves, it can drive the gear 18 connected to it to move on the gear rod 17. At this time, the gear 18 rotates under the action of the gear rod 17. When the gantry slide 2 moves too fast, the speed of the gear 18 can be too fast. The gear 18 drives the transmission rod 19 fixedly connected to it to rotate, so that the transmission rod 19 drives the hydraulic warehouse 20 fixedly connected to it to rotate quickly. Under the action of centripetal force, the push plate 22 in the hydraulic warehouse 20 pulls the elastic rod 21 fixedly connected to it, causing movement, thereby increasing the pressure in the hydraulic warehouse 20, driving the pressure plate 23 slidingly connected to the piston of the hydraulic warehouse 20 to move, so that the pressure plate 23 drives the rubber block 24 fixedly connected to it to move, and the rubber block 24 immediately moves to the workbench 1 for friction deceleration.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-gantry double-arc metal rapid prototyping machine, comprising a workbench (1) and a gantry ram (2), characterized in that: A gantry frame (7) is fixedly installed on the top of the gantry slide (2), a slide forward and backward movement mechanism (3) is fixedly installed on the bottom of the gantry slide (2), the gantry frame (7) is connected to a crossbeam (6) at one end close to the workbench (1) by setting a crossbeam up and down movement mechanism (8), the crossbeam (6) is fixedly connected to a flange left and right movement track (4) at one end close to the workbench (1), and the flange left and right movement track (4) is connected to an arc additive manufacturing processing head connection by setting a flange left and right movement mechanism (5). A connecting flange (11), a right-angle reducer (9) is fixedly installed at one end of the crossbeam (6) close to the workbench (1), an arc additive manufacturing processing head (10), an arc additive manufacturing power supply (12), an arc additive manufacturing wire feeding mechanism (13), an arc additive manufacturing water and gas system (14) and an arc additive manufacturing control system (15) are fixedly installed at one end of the arc additive manufacturing processing head connecting flange (11) close to the workbench (1), and an inert gas cabin (16) is arranged on the outside of the workbench (1).

2. A double-gantry double-arc metal rapid prototyping machine according to claim 1, characterized in that: The gantries (7) are provided in two groups, and the two groups of gantries (7) are symmetrically distributed about the central axis of the workbench (1).

3. The double-gantry double-arc metal rapid prototyping machine according to claim 1, characterized in that: A speed reduction mechanism is arranged on the side of the workbench (1); the speed reduction mechanism comprises a gear rod (17); a gear (18) is rotatably connected to the side of the gantry slide (2); a transmission rod (19) is fixedly connected to the side of the gear (18); a hydraulic chamber (20) is fixedly connected to the side of the transmission rod (19); an inner wall of the hydraulic chamber (20) is piston-slidingly connected to a push plate (22) via an elastic rod (21); an end of the hydraulic chamber (20) away from the push plate (22) is piston-slidingly connected to a pressure plate (23); and a rubber block (24) is fixedly connected to the outer side of the pressure plate (23).

4. The double-gantry double-arc metal rapid prototyping machine according to claim 3, characterized in that: The gear rod (17) is located at the top of the workbench (1), and the gear rod (17) and the workbench (1) are in a fixed state.

5. The double-gantry double-arc metal rapid prototyping machine according to claim 3, characterized in that: The gear (18) is located at the top of the gear rod (17), and the gear (18) and the gear rod (17) are in meshing state.

6. The double-gantry double-arc metal rapid prototyping machine according to claim 3, characterized in that: Three pressing plates (23) are provided, and the three pressing plates (23) are distributed in a circular row with respect to the transmission rod (19).

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