An in-situ heat treated large component additive device

Abstract

The application relates to a large component additive device for instant heat treatment, comprising an additive platform, a plurality of cooperative additive motion mechanisms and a heat preservation system; the additive platform is fixed on the ground; the plurality of cooperative additive motion mechanisms are arranged around the periphery of the additive platform; the plurality of cooperative additive motion mechanisms additively manufacture the large component on the additive platform in the vertical direction; the heat preservation system is wrapped on the surface of the large component; each cooperative additive motion mechanism comprises a stand, a motion mechanism, an additive mechanism and an annealing mechanism; the stand is arranged in the vertical direction; the motion mechanism is in sliding connection with the stand; the additive mechanism and the annealing mechanism are in fixed connection with the motion mechanism; and the annealing mechanism is located below the additive mechanism. The application makes the material produce structure transformation through heat treatment annealing, the heat preservation system preserves the part after heat treatment, the uneven distribution of stress is fundamentally eliminated, the deformation amount of the large component is reduced, and the additive forming quality of the large component is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal additive manufacturing, and particularly relates to an instant heat treatment large component additive device. BACKGROUND

[0002] Metal additive manufacturing refers to melting wire or powder material through an electric arc, an electron beam and a laser and the like heat source, and then manufacturing a metal component through layer-by-layer reciprocating accumulation on an additive base. Compared with other manufacturing technologies, the additive manufacturing technology has the advantages of high efficiency, short overall manufacturing period and low manufacturing cost. However, whether it is a small, medium or large component, in the process of welding additive accumulation, heat will inevitably be accumulated in the structure, which further causes uneven stress distribution, and finally generates large residual stress and deformation in the additive component, affects the performance of the additive component and limits the application of the additive manufacturing technology. Especially for large components with large length-width ratio, the additive period is long, the additive amount is large, which leads to complex stress and thermal stress distribution.

[0003] The existing solution mainly is to remove stress of the additive component after the additive is completed, but large deformation will occur in the additive process of the large component, which leads to problems such as additive point loss and interlayer tearing of the additive component. After the additive is formed, there is still large residual stress and deformation, and the effect of removing residual stress by heat treatment after the overall additive is formed is limited, which affects the additive forming quality. Therefore, an additive device for instant heat treatment of large components is needed. SUMMARY

[0004] In order to solve the above problems in the prior art, the application provides an instant heat treatment large component additive device. The technical problem to be solved by the application is solved by the following technical scheme:

[0005] The application provides an instant heat treatment large component additive device, which comprises an additive platform, a plurality of cooperative additive motion mechanisms and a heat preservation system.

[0006] The additive platform is fixed on the ground.

[0007] The plurality of cooperative additive motion mechanisms are arranged around the periphery of the additive platform. The plurality of cooperative additive motion mechanisms additively manufacture large components in the vertical direction on the additive platform.

[0008] The heat preservation system is wrapped on the surface of the large component.

[0009] Each of the cooperative additive motion mechanisms comprises a stand, a motion mechanism, an additive mechanism and an annealing mechanism.

[0010] The column is arranged in a vertical direction; the movement mechanism is in sliding connection with the column; the additive mechanism and the annealing mechanism are both in fixed connection with the movement mechanism; the annealing mechanism is below the additive mechanism.

[0011] In an embodiment of the present application, an additive base is arranged on the additive platform.

[0012] The upper surface of the additive base is the additive reference surface of the large component, and the additive direction of the large component is perpendicular to the additive reference surface.

[0013] In an embodiment of the present application, a plurality of straight guide rails are arranged in parallel in a vertical direction on the column, and a sliding mechanism corresponding to the straight guide rails is arranged on the movement mechanism.

[0014] In an embodiment of the present application, the cooperative additive movement mechanism further comprises a column guide rail.

[0015] The column guide rail is fixed to the ground.

[0016] The column is arranged on the column guide rail, and the column is in sliding connection with the column guide rail.

[0017] In an embodiment of the present application, the additive mechanism comprises an additive robot and a wire feeding system.

[0018] The additive robot and the wire feeding system are both arranged on the movement mechanism.

[0019] The wire feeding system is connected to the additive robot, and is used to provide the additive robot with a wire-shaped additive raw material.

[0020] In an embodiment of the present application, the annealing mechanism comprises a plurality of flame jet devices.

[0021] The plurality of flame jet devices are arranged side by side, and the plurality of flame jet devices are both in fixed connection with the movement mechanism.

[0022] The plurality of flame jet devices spray flames to form a heat treatment area, and the total width of the heat treatment area is greater than or equal to the maximum width of the large component.

[0023] In an embodiment of the present application, the annealing mechanism further comprises an infrared temperature measurement system.

[0024] The infrared temperature measurement system is in fixed connection with the movement mechanism,

[0025] The infrared temperature measurement system is below the plurality of flame jet devices, and is used to collect the surface temperature of the large component in the heat treatment area.

[0026] In one embodiment of the present application, the heat preservation system comprises a plurality of ceramic heating sheets.

[0027] The plurality of ceramic heating sheets are arranged side by side, and the plurality of ceramic heating sheets are wrapped around the surface of the large component.

[0028] In one embodiment of the present application, the instant heat treatment large component additive device further comprises a general control system.

[0029] The general control system is respectively connected to the motion mechanism, the additive mechanism and the annealing mechanism by a circuit, and the general control system cooperatively controls the motion of the motion mechanism, the additive mechanism and the annealing mechanism.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] The instant heat treatment large component additive device of the present application adopts a vertical additive method based on the principle of mutual balance of cross-sectional radial stress, and uses multiple columns, multiple machines and multiple external shafts to cooperatively and symmetrically add materials, so that the deformation of the additive component is small. The additive mechanism and the annealing mechanism are arranged on the columns, and the annealing mechanism and the additive mechanism cooperatively move, so that the annealing device sprays a flame during the additive process, and the large component is instantaneously heat treated by the flame, thereby improving the heat treatment efficiency. The additive material is subjected to organizational transformation through heat treatment and annealing, which can fundamentally eliminate stress concentration and uneven distribution of stress, reduce the deformation of the large component, and ensure the additive forming quality of the large component. The heat treated part is further heat preserved by the heat preservation system, thereby reducing the temperature gradient and the cooling rate of the large component, improving the heat treatment effect, and further reducing the deformation of the large component.

[0032] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure schematic diagram of an instant heat treatment large component additive device provided by an embodiment of the present application;

[0034] Figure 2 is a front view of a structure of an instant heat treatment large component additive device provided by an embodiment of the present application;

[0035] Figure 3 is a side view of a structure of an instant heat treatment large component additive device provided by an embodiment of the present application;

[0036] Figure 4 is a structural view of a large component additive device for instant heat treatment provided by an embodiment of the present application.

[0037] Figure: 1-additive platform; 11-additive base; 2-synergistic additive motion mechanism; 21-column; 22-motion mechanism; 23-additive mechanism; 231-additive robot; 232-wire feeding system; 24-annealing mechanism; 241-flame jet device; 242-infrared temperature measurement system; 25-column guide rail; 3-heat preservation system; 4-large component; 5-general control system. DETAILED DESCRIPTION

[0038] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined object, the following will be described in detail in combination with the drawings and specific embodiments, and an additive device for instant heat treatment of large components according to the present application will be described in detail.

[0039] The foregoing and other technical contents, features and effects of the present application will be clearly presented in the following detailed description of specific embodiments in combination with the drawings. Through the description of specific embodiments, the technical means and effects taken by the present application to achieve the predetermined object can be understood more deeply and specifically. However, the attached drawings are provided for reference and illustration only, and are not used to limit the technical solutions of the present application.

[0040] Embodiment one

[0041] Please see Figures 1 to 4 , Figure 1 is a structural view of a large component additive device for instant heat treatment provided by an embodiment of the present application. Figure 2 is a structural front view of a large component additive device for instant heat treatment provided by an embodiment of the present application. Figure 3 is a structural side view of a large component additive device for instant heat treatment provided by an embodiment of the present application. Figure 4 is a structural top view of a large component additive device for instant heat treatment provided by an embodiment of the present application.

[0042] As shown in the figure, the additive device for instant heat treatment of large components of the present application comprises: an additive platform 1 and a plurality of synergistic additive motion mechanisms 2.

[0043] Among them, the additive platform 1 is fixed on the ground; the plurality of synergistic additive motion mechanisms 2 are arranged around the periphery of the additive platform 1; the plurality of synergistic additive motion mechanisms 2 move synergistically to manufacture large components 4 on the additive platform 1 in the vertical direction.

[0044] In the embodiment, each cooperative additive motion mechanism 2 comprises a column 21, a motion mechanism 22, an additive mechanism 23 and an annealing mechanism 24.

[0045] The column 21 is arranged in a vertical direction; the motion mechanism 22 is in sliding connection with the column 21; the additive mechanism 23 and the annealing mechanism 24 are in fixed connection with the motion mechanism 22, and the additive mechanism 23 and the annealing mechanism 24 are connected with the motion mechanism 22 as a whole, moving along the vertical direction on the column 21 with the motion mechanism 22, and completing additive operation and annealing operation respectively through the vertical direction movement.

[0046] In the embodiment, the annealing mechanism 24 is located below the additive mechanism 23, that is, the annealing operation is performed after the additive operation is completed or partially completed, and the large component 4 is heated to complete the instant heat treatment. Through the heat treatment, the additive material is subjected to a structure transformation, so as to fundamentally eliminate stress concentration and uneven distribution, reduce the deformation of the additive component, and improve the additive quality.

[0047] It is worth noting that, based on the principle of mutual balance of radial stress of cross section, the stations of additive manufacturing should be symmetrically arranged, that is, the additive height of each station is the same at the same time by using vertical additive method, which is reflected in the embodiment as that the plurality of cooperative additive motion mechanisms 2 are symmetrically arranged around the additive platform 1, that is, the additive speed of the large component 4 in each direction is the same. Similarly, under the driving of the motion mechanism 22, the additive speed and the annealing speed of the additive mechanism 23 and the annealing mechanism 24 should also be the same in each direction.

[0048] In an optional embodiment, the additive platform 1 is provided with an additive base 11.

[0049] The upper surface of the additive base 11 is the additive reference surface of the large component 4, and the additive direction of the large component 4 is perpendicular to the additive reference surface.

[0050] In an optional embodiment, a plurality of straight guide rails are arranged in parallel in the vertical direction on the column 21, and a sliding mechanism corresponding to the straight guide rails is arranged on the motion mechanism 22, so as to realize the movement of the motion mechanism 22 along the vertical direction on the column 21 through the cooperation of the straight guide rails and the sliding mechanism, and realize vertical additive.

[0051] In an optional embodiment, the motion mechanism 22 is provided with an independent servo driving mechanism, so as to drive the motion mechanism 22 to slide along the straight guide rail by the servo driving mechanism.

[0052] In an optional embodiment, a ladder is further arranged on the column 21, so as to facilitate the assembly and maintenance of the equipment arranged on the column 21.

[0053] In an optional embodiment, the cooperative additive motion mechanism 2 further comprises: a column guide rail 25;

[0054] The column guide rail 25 is fixed on the ground, and the column 21 is arranged on the column guide rail 25, and the bottom end of the column 21 is in sliding connection with the column guide rail 25.

[0055] It is worth noting that by arranging the column guide rail 25, the application range of the large component additive device for instant heat treatment is expanded, which is applicable to large components 4 of various sizes, and the additive quality is improved.

[0056] In an optional embodiment, the additive mechanism 23 comprises: an additive robot 231 and a wire feeding system 232.

[0057] The additive robot 231 and the wire feeding system 232 are arranged on the motion mechanism 22, and the wire feeding system 232 is connected to the additive robot 231 to provide the additive robot 231 with wire-shaped additive raw materials.

[0058] In an optional embodiment, the additive robot 231 is a multi-external-axis multi-degree-of-freedom mechanical arm, and the front end is provided with an additive gun, and the wire feeding system 232 is a wire feeding system for the additive gun.

[0059] In an optional embodiment, an independent additive power supply is used to supply power to the additive robot 231 and the wire feeding system 232, the additive gun is ignited to melt the wire, and repeated accumulation can realize additive.

[0060] In this embodiment, the annealing mechanism 24 comprises: a plurality of flame spraying devices 241 arranged side by side, and the plurality of flame spraying devices 241 are fixedly connected with the motion mechanism 22.

[0061] In an optional embodiment, the plurality of flame spraying devices 241 spray flames to form a heat treatment area, and the total width of the heat treatment area is greater than or equal to the maximum width of the large component 4, so as to ensure that the heat treatment area can cover a certain additive height of the large component 4.

[0062] In an optional embodiment, the plurality of flame spraying devices 241 in the annealing mechanism 24 spray flames to face the large component 4, so that the temperature of the large component 4 is maintained within a stable range, and the temperature range is determined according to the limit temperature of the phase change of the additive material and the structural requirements of the component.

[0063] In an optional embodiment, the annealing mechanism 24 further comprises: a flame spraying device 241.

[0064] In an optional embodiment, the infrared temperature measurement system 242 is fixedly connected with the motion mechanism 22, and the infrared temperature measurement system 242 is located below the plurality of flame jet devices 241, and is used to collect the surface temperature of the large component 4 located in the heat treatment area.

[0065] In the embodiment, the large component instant heat treatment additive device further comprises a heat preservation system 3.

[0066] The heat preservation system 3 is wrapped on the surface of the large component 4, and is used to preserve the temperature of the large component 4 after heat treatment, so that the temperature of the heat treatment area is maintained within a suitable range, so as to reduce the temperature gradient and cooling rate of the large component 4, thereby improving the heat treatment effect and further reducing the deformation amount of the large component 4.

[0067] In an optional embodiment, the heat preservation system 3 comprises a plurality of ceramic heating sheets arranged side by side, and the plurality of ceramic heating sheets are wrapped on the surface of the large component 4 to heat the large component 4. The positions of the plurality of ceramic heating sheets are adjustable, so as to facilitate the heat preservation adjustment according to the additive process of the large component 4.

[0068] In an optional embodiment, the large component instant heat treatment additive device controls the motion of the motion mechanism 22, the additive mechanism 23 and the annealing mechanism 24 through the general control system 5.

[0069] In an optional embodiment, the general control system 5 is arranged on the ground and is electrically connected with the motion mechanism 22, the additive mechanism 23 and the annealing mechanism 24.

[0070] In an optional embodiment, the general control system 5 further controls the start and stop of the annealing mechanism 24 through the height sensor arranged on the motion mechanism 22. When the additive direction of the large component 4 is greater than or equal to 0.5 meters, the general control system 5 controls the annealing mechanism 24 to start, and at this time, the effective heat treatment range of the annealing mechanism 24 is also 0.5 meters.

[0071] It is worth noting that the general control system 5 also controls the start or stop of the plurality of flame jet devices 241 according to the surface temperature of the large component 4 collected by the infrared temperature measurement system 242, so as to realize the stable and controllable annealing temperature.

[0072] In the specific embodiment, first, the workpiece coordinate system is calibrated with the center of the additive platform 1 as the origin, and the additive path is planned. The additive gun at the front end of each work station additive robot 231 is controlled to reach the specified position, and the additive is performed along the long side of the large component 4 as the additive height direction.

[0073] Secondly, when the additive deposition height exceeds 0.5 meters, the flame spraying device 241 is started to heat the current additive plane downward 0.5 meters, and the infrared temperature measurement system 242 is used to measure the temperature of the heat treatment area; the heating is continued, and the flame spraying device 241 and the infrared temperature measurement system 242 are both moved upward synchronously with the increase of the additive height.

[0074] Thirdly, when the infrared temperature measurement system 242 detects that the temperature of the heat treatment area is greater than 500 DEG C, the heating is stopped, and when the temperature is lower than 450 DEG C, the heating is continued, so that the temperature is stably controlled in the range of 450 DEG C-500 DEG C, and the phase change of the material organization occurs in this temperature, thereby solving the problems of stress concentration and uneven distribution, and reducing the deformation amount of the large component 4.

[0075] At the same time of heat treatment, the heat preservation system 3 is used to heat the heat treated area, a plurality of ceramic heating sheets are wrapped on the surface of the large component 4, and then the heating temperature of the ceramic heating sheet is controlled until the heat preservation requirement of heat treatment is met.

[0076] Finally, after the additive is completed, the columns 21 are all retreated to the safe position along the column guide rails 25, the large component 4 is hoisted out, and the above operation is repeated to continue the additive.

[0077] The large component additive device for instant heat treatment provided by the application adopts the vertical additive mode based on the principle that the radial stresses of the cross section balance each other, and the additive is performed by multiple columns, multiple machines and multiple external shafts in a coordinated and symmetrical manner, so that the deformation of the additive component is small. The additive mechanism and the annealing mechanism are both arranged on the column, and the annealing mechanism and the additive mechanism move coordinately, the annealing device sprays flame in the additive process, the large component is instant heat treated through the flame, and the heat treatment efficiency is improved. The additive material is subjected to organization transformation through heat treatment annealing, stress concentration and uneven distribution of stress can be fundamentally eliminated, the deformation amount of the large component is reduced, and the additive forming quality of the large component is ensured. The heat treated part is heat preserved through the heat preservation system, the temperature gradient and the cooling rate of the large component are reduced, the heat treatment effect is improved, and the deformation amount of the large component is further reduced.

[0078] It is to be understood that the terminology used herein such as first and second, and the like, is only to distinguish one from another without prejudice to either and is not necessarily used in a sequence. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a vesicle or an apparatus that comprises a list of components does not include only those components but can include other components not expressly listed or inherent to such vesicle or apparatus. The terms "comprises", "comprising", or any other variations thereof, do not have the meaning of excluding other components not expressly listed. The term "connected" or "coupled" or any other variations thereof are not to be construed as being necessarily limited to a physical or mechanical connection or coupling, but can also include an electrical connection or coupling, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships as shown in the drawings and are made only for the purpose of ease of description and illustration, and thus can not be construed as indicating or implying necessary or absolutely specific orientations, configurations, or operations of the device or components thereof, and therefore should not be understood as limiting the present application.

[0079] The above description is further to the present application in connection with specific preferred embodiments, and cannot be deemed as limiting the specific implementation of the present application to these descriptions. For those skilled in the art to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of these should be deemed as falling within the protection scope of the present application.

Claims

1. A large component additive device for instant heat treatment, characterized by, The application relates to a large-scale additive manufacturing device. The device comprises an additive platform (1), a plurality of cooperative additive motion mechanisms (2) and a heat preservation system (3). The additive platform (1) is fixed on the ground, the plurality of cooperative additive motion mechanisms (2) are arranged around the periphery of the additive platform (1), the plurality of cooperative additive motion mechanisms (2) additively manufacture a large component (4) on the additive platform (1) along the vertical direction, and the heat preservation system (3) covers the surface of the large component (4). Each cooperative additive motion mechanism (2) comprises a stand (21), a motion mechanism (22), an additive mechanism (23) and an annealing mechanism (24), the stand (21) is arranged along the vertical direction, the motion mechanism (22) is in sliding connection with the stand (21), the additive mechanism (23) and the annealing mechanism (24) are fixedly connected with the motion mechanism (22), and the annealing mechanism (24) is located below the additive mechanism (23). The annealing mechanism (24) comprises a plurality of flame jet devices (241) and an infrared temperature measurement system (242), the plurality of flame jet devices (241) are arranged side by side and fixedly connected with the motion mechanism (22), the plurality of flame jet devices (241) spray flames to form a heat treatment area, the total width of the heat treatment area is greater than or equal to the maximum width of the large component (4), and the infrared temperature measurement system (242) is fixedly connected with the motion mechanism (22) and located below the plurality of flame jet devices (241) and used for collecting the surface temperature of the large component (4) located in the heat treatment area.

2. The in-situ heat treated large component additive device of claim 1, wherein, An additive base (11) is arranged on the additive platform (1), the upper surface of the additive base (11) is an additive reference surface of the large component (4), and the additive direction of the large component (4) is perpendicular to the additive reference surface.

3. The in-situ heat treated large component additive device of claim 1, wherein, A plurality of straight guide rails are arranged in parallel on the stand (21) along the vertical direction, and a sliding mechanism matched with the straight guide rails is correspondingly arranged on the motion mechanism (22).

4. The in-situ heat treated large component additive device of claim 1, wherein, The cooperative additive motion mechanism (2) further comprises a stand guide rail (25), the stand guide rail (25) is fixed on the ground, the stand (21) is arranged on the stand guide rail (25) and in sliding connection with the stand guide rail (25).

5. The in-situ heat treated large component additive device of claim 1, wherein, The additive mechanism (23) comprises an additive robot (231) and a wire feeding system (232), the additive robot (231) and the wire feeding system (232) are arranged on the motion mechanism (22), the wire feeding system (232) is connected with the additive robot (231) and used for providing the additive robot (231) with a wire-shaped additive raw material.

6. The in-situ heat treated large component additive device of claim 1, wherein, The heat preservation system (3) comprises a plurality of ceramic heating sheets, the plurality of ceramic heating sheets are arranged side by side and cover the surface of the large component (4).

7. The in-situ heat treated large component additive apparatus of claim 1, wherein, The instant heat treatment large component additive device further comprises a general control system (5), the general control system (5) is respectively circuit connected with the motion mechanism (22), the additive mechanism (23) and the annealing mechanism (24), and the general control system (5) cooperatively controls the motion of the motion mechanism (22), the additive mechanism (23) and the annealing mechanism (24).

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