Cooling device, electric arc additive manufacturing apparatus and method of use

Abstract

The application discloses a cooling device, an electric arc additive manufacturing device and a use method. The cooling device comprises a first support configured to be arranged on a welding torch, a cooling assembly arranged on the first support, the cooling assembly comprising a supporting body, a first cooling nozzle, a second support and two second cooling nozzles, the first cooling nozzle being arranged at the bottom of the supporting body, the second support being arranged on the supporting body, the two second cooling nozzles being arranged on the second support and respectively located at two opposite sides of the first cooling nozzle, and the horizontal distance between one of the second cooling nozzles and the first cooling nozzle is equal to the horizontal distance between the other second cooling nozzle and the first cooling nozzle; a first driving assembly is configured to drive the cooling assembly to revolve around the axis of the welding torch as a rotation center line; and a second driving assembly is configured to drive the two second cooling nozzles to revolve around the axis of the first cooling nozzle as a rotation center line. The cooling device can better adapt to the printing process of a curved surface and a thin wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric arc additive manufacturing, and in particular to a cooling device, an electric arc additive manufacturing device and a use method. BACKGROUND

[0002] Wire arc additive manufacturing (WAAM) technology is a manufacturing technology that uses electric arc as a heat source to heat and melt metal wire, and prints three-dimensional parts in a layer-by-layer manner. Compared with traditional casting, forging and subtractive manufacturing, the electric arc additive manufacturing technology has the characteristics of high deposition efficiency, high wire utilization rate, short manufacturing cycle, low cost and easy automation. During the process of electric arc additive manufacturing, a large amount of heat is generated, and it takes a long time to completely eliminate the heat. In order not to affect the processing efficiency, the next layer of cladding usually needs to be started before the heat of the previous layer of cladding is completely eliminated, so that the residual heat in the part will be more and more, and finally lead to the problem of heat accumulation. Therefore, the traditional electric arc additive manufacturing device is usually provided with a cooling device that can move with the welding gun. During the process of electric arc additive manufacturing, the cooling device actively cools the forming area of the part by using a cooling medium to improve the cooling rate of the forming area of the part, so as to reduce the heat accumulation of the part, and thus is beneficial to improve the performance of the part.

[0003] However, the traditional cooling device cannot better adapt to the printing process of curved thin walls, so that the cooling effect of the cooling device of the electric arc additive manufacturing device is not ideal when printing curved thin walls. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a cooling device which can better adapt to the printing process of curved thin walls, thereby being beneficial to enhance the cooling effect when printing curved thin walls.

[0005] The present application also provides an electric arc additive manufacturing device having the above-mentioned cooling device.

[0006] The present application also provides a use method applied to the above-mentioned electric arc additive manufacturing device.

[0007] The cooling device according to the first aspect of the present application is used for assembling on a welding torch of an electric arc additive manufacturing device, and comprises: a first support configured to be arranged on the welding torch; a cooling assembly arranged on the first support, the cooling assembly comprising a supporting body, a first cooling nozzle arranged at the bottom of the supporting body, a second support arranged on the supporting body, and two second cooling nozzles arranged on the second support and located on opposite sides of the first cooling nozzle respectively, wherein the horizontal distance between one of the second cooling nozzles and the first cooling nozzle is equal to the horizontal distance between the other second cooling nozzle and the first cooling nozzle; a first driving assembly configured to be arranged on the welding torch and capable of driving the cooling assembly to revolve around the axis of the welding torch as the center line of rotation; and a second driving assembly arranged on the supporting body and capable of driving the two second cooling nozzles to revolve around the axis of the first cooling nozzle as the center line of rotation.

[0008] The cooling device according to the present application has at least the following beneficial effects: when printing a curved thin wall, the cooling device moves along with the welding torch to cool the formed part of the curved thin wall, in this process, the first driving assembly can drive the cooling assembly to revolve around the axis of the welding torch as the center line of rotation, so that the first cooling nozzle can always be located directly above the formed part of the curved thin wall, and the second driving assembly can drive the two second cooling nozzles to revolve around the axis of the first cooling nozzle as the center line of rotation, so that the two second cooling nozzles are always located on the inner and outer sides of the formed part of the curved thin wall, and the horizontal distance between one of the second cooling nozzles and the inner side wall of the formed part of the curved thin wall is always equal to the horizontal distance between the other second cooling nozzle and the outer side wall of the formed part of the curved thin wall, so that the above-mentioned cooling device can better adapt to the printing process of the curved thin wall, thereby facilitating to enhance the cooling effect when printing the curved thin wall.

[0009] According to some embodiments of the present application, the first support is in a cylindrical shape, the first support is arranged coaxially and rotatably on the welding torch, so that the axis of the first support is collinear with the axis of the welding torch, the first driving assembly comprises a first driving motor and a first gear transmission assembly, the first driving motor is fixedly arranged on the welding torch, and the first gear transmission assembly is arranged between the output end of the first driving motor and the first support, so that the first driving motor can drive the first support to rotate around the axis of the welding torch as the center line of rotation.

[0010] According to some embodiments of the present application, the support body is cylindrical, the first cooling nozzle is coaxially arranged at the bottom of the support body, so that the axis of the first cooling nozzle is collinear with the axis of the support body, the second support is cylindrical, the second support is coaxially and rotatably sleeved on the support body, so that the axis of the second support is collinear with the axis of the support body, the second driving assembly comprises a second driving motor and a second gear transmission assembly, the second driving motor is fixedly arranged on the support body, and the second gear transmission assembly is arranged between the output end of the second driving motor and the second support, so that the second driving motor can drive the second support to rotate around the axis of the support body as the rotation center line.

[0011] According to some embodiments of the present application, a first adjusting assembly is arranged between the second support and the two second cooling nozzles, and the first adjusting assembly is used to adjust the horizontal distance between the two second cooling nozzles.

[0012] According to some embodiments of the present application, the first adjusting assembly comprises an adjusting member, a screw and two sets of connecting rod assemblies, the adjusting member is annular, the adjusting member is slidably sleeved on the support body, the screw is arranged on the adjusting member and is threadedly connected to the adjusting member, two outwardly extending connecting portions are arranged on the second support corresponding to the two second cooling nozzles, one set of connecting rod assemblies is arranged between each connecting portion and the corresponding second cooling nozzle, each connecting rod assembly comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is hingedly connected to the end of the corresponding connecting portion away from the second support, the other end of the first connecting rod is hingedly connected to the corresponding second cooling nozzle, one end of the second connecting rod is hingedly connected to the adjusting member, and the other end of the second connecting rod is hingedly connected to the middle part of the first connecting rod, and the adjusting member can drive the two second cooling nozzles to move close to or away from each other through the two sets of connecting rod assemblies when the adjusting member slides up and down.

[0013] According to some embodiments of the present application, a linear telescopic drive is arranged between the connecting portion and the corresponding second cooling nozzle, one end of the linear telescopic drive is hingedly connected to the end of the corresponding connecting portion away from the second support, the other end of the linear telescopic drive is hingedly connected to the corresponding second cooling nozzle, the second cooling nozzle has a first hinged point with the corresponding linear telescopic drive, and the same second cooling nozzle has a second hinged point with the corresponding first connecting rod, and the first hinged point and the second hinged point are arranged in a spaced manner, so that the linear telescopic drive can adjust the angle of the corresponding second cooling nozzle.

[0014] According to some embodiments of the present application, a second adjusting assembly is arranged between the first support and the cooling assembly, and is used to adjust the horizontal distance between the cooling assembly and the welding torch.

[0015] According to some embodiments of the present application, a third adjusting assembly is arranged between the first support and the cooling assembly, and is used to adjust the height of the cooling assembly.

[0016] The electric arc additive manufacturing device according to the second aspect of the present application comprises the cooling device according to the first aspect of the present application.

[0017] The use method according to the third aspect of the present application is applied to the electric arc additive manufacturing device according to the second aspect of the present application, and comprises the following steps:

[0018] S1, a three-dimensional model is established based on a curved thin wall to be printed, and slicing and path planning are performed, a welding torch movement program is generated, a control program of a cooling assembly is calculated and written for curved thin wall features and printing cooling process, and relevant programs are imported into a background control system;

[0019] S2, the welding torch is moved to an initial position, and the first cooling nozzle and the two second cooling nozzles are moved to the initial position;

[0020] S3, cooling gas is supplied to the first cooling nozzle and the two second cooling nozzles, printing is started, the welding torch is ignited and moves along the planned path, the first cooling nozzle and the two second cooling nozzles follow the rear side of the welding torch to cool the formed part of the curved thin wall, and the relative position between the cooling assembly and the curved thin wall is controlled according to the relevant program during printing;

[0021] S4, until the welding torch completes the planned path, the curved thin wall is printed, the welding torch is turned off, the supply of cooling gas to the first cooling nozzle and the two second cooling nozzles is stopped, each movable mechanical part is moved to the initial position, and the electric arc additive manufacturing process of the curved thin wall is completed.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, in which:

[0024] Figure 1 is a structural schematic view of a cooling device of an embodiment of the present application assembled with a welding torch;

[0025] Figure 2 is a schematic view of the positional relationship of the welding torch, the first cooling nozzle, the second cooling nozzle and the curved thin wall at a moment when the curved thin wall is printed from a top view;

[0026] Figure 3 is a schematic view of the positional relationship of the welding torch, the first cooling nozzle, the second cooling nozzle and the curved thin wall at another moment when the curved thin wall is printed from a top view.

[0027] Reference signs:

[0028] Welding torch a, curved thin wall b, first support 100, support body 210, first cooling nozzle 220, second support 230, connecting part 231, second cooling nozzle 240, first driving motor 310, first gear transmission assembly 320, first transmission gear 321, second transmission gear 322, second driving motor 410, second gear transmission assembly 420, third transmission gear 421, fourth transmission gear 422, adjusting part 510, screw 520, first connecting rod 531, second connecting rod 532, linear telescopic drive 600, first guide rail 710, first sliding block 720, first lead screw 730, third driving motor 740, second guide rail 810, second sliding block 820, second lead screw 830, fourth driving motor 840. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used only for the purpose of explaining the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that if the orientation description is involved, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0031] In the description of the present application, if the words such as several, greater than, less than, more than, above, below, within, etc. appear, wherein the meaning of several is one or more, the meaning of more than two is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number.

[0032] In the description of the present application, if the first, second, etc. words appear, they are only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0033] In the description of the present application, unless otherwise expressly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0034] Referring to Figure 1 , the electric arc additive manufacturing equipment according to the embodiments of the present application comprises a welding gun a and a cooling device, the cooling device is assembled on the welding gun a, wherein the cooling device comprises a first support 100, a cooling assembly, a first driving assembly and a second driving assembly.

[0035] Specifically, the first support 100 is arranged on the welding gun a, the cooling assembly is arranged on the first support 100, the cooling assembly comprises a support body 210, a first cooling nozzle 220, a second support 230 and two second cooling nozzles 240, the first cooling nozzle 220 is arranged at the bottom of the support body 210, the second support 230 is arranged on the support body 210, and the two second cooling nozzles 240 are arranged on the second support 230. Two second cooling nozzles 240 are respectively located on the opposite sides of the first cooling nozzle 220, wherein the horizontal distance between one of the second cooling nozzles 240 and the first cooling nozzle 220 and the horizontal distance between the other second cooling nozzle 240 and the first cooling nozzle 220 are equal (that is, the horizontal distance from one of the second cooling nozzles 240 to the first cooling nozzle 220 is equal to the horizontal distance from the other second cooling nozzle 240 to the first cooling nozzle 220), the first driving assembly is arranged on the welding gun a and can drive the cooling assembly to revolve around the axis of the welding gun a as the rotation center line, and the second driving assembly is arranged on the support body 210 and can drive the two second cooling nozzles 240 to revolve around the axis of the first cooling nozzle 220 as the rotation center line.

[0036] Referring to Figure 2 and Figure 3 , wherein, Figure 2 and Figure 3The direction indicated by the middle arrow is the movement direction of the welding gun a. When printing the curved thin wall b, the cooling device moves along with the welding gun a to cool the formed part of the curved thin wall b. In this process, the first driving assembly can drive the cooling assembly to revolve around the axis of the welding gun a as the rotation center line, so that the first cooling nozzle 220 can always be located above the formed part of the curved thin wall b. The second driving assembly can drive the two second cooling nozzles 240 to revolve around the axis of the first cooling nozzle 220 as the rotation center line, so that the two second cooling nozzles 240 are always located on the inner and outer sides of the formed part of the curved thin wall b, and the horizontal distance between one of the second cooling nozzles 240 and the inner side wall of the formed part of the curved thin wall b is always equal to the horizontal distance between the other second cooling nozzle 240 and the outer side wall of the formed part of the curved thin wall b (i.e., the horizontal distance between one of the second cooling nozzles 240 and the inner side wall of the formed part of the curved thin wall b is always equal to the horizontal distance between the other second cooling nozzle 240 and the outer side wall of the formed part of the curved thin wall b). The above cooling device can better adapt to the printing process of the curved thin wall b, thereby facilitating to enhance the cooling effect during printing the curved thin wall b.

[0037] With reference to Figure 1 In some embodiments, the first support 100 is in a cylindrical shape, and the first support 100 is coaxially and rotatably sleeved on the welding gun a, so that the axis of the first support 100 is collinear with the axis of the welding gun a. The first driving assembly includes a first driving motor 310 and a first gear transmission assembly 320. The first driving motor 310 is fixedly arranged on the welding gun a. The first gear transmission assembly 320 is arranged between the output end of the first driving motor 310 and the first support 100, so that the first driving motor 310 can drive the first support 100 to rotate around the axis of the welding gun a as the rotation center line, thereby driving the cooling assembly to revolve around the axis of the welding gun a as the rotation center line. The structure is simple and easy to implement. Specifically, the first gear transmission assembly 320 includes a first transmission gear 321 and a second transmission gear 322 that are engaged with each other. The first transmission gear 321 is connected to the output end of the first driving motor 310. The second transmission gear 322 is sleeved on the welding gun a and coaxially connected with the first support 100.

[0038] It should be noted that in some other embodiments, the first gear transmission assembly 320 can also be replaced by a synchronous belt transmission assembly, which is not limited here.

[0039] With reference to Figure 1In some embodiments, the support body 210 is cylindrical, the first cooling nozzle 220 is coaxially arranged at the bottom of the support body 210, so that the axis of the first cooling nozzle 220 is collinear with the axis of the support body 210, the second support 230 is cylindrical, the second support 230 is rotatably coaxially sleeved on the support body 210, so that the axis of the second support 230 is collinear with the axis of the support body 210, the second driving assembly includes a second driving motor 410 and a second gear transmission assembly 420, the second driving motor 410 is fixedly arranged on the support body 210, and the second gear transmission assembly 420 is arranged between the output end of the second driving motor 410 and the second support 230, so that the second driving motor 410 can drive the second support 230 to rotate around the axis of the support body 210 as the center line, that is, the second driving motor 410 can drive the second support 230 to rotate around the axis of the first cooling nozzle 220 as the center line, so as to drive the two second cooling nozzles 240 to revolve around the axis of the first cooling nozzle 220 as the center line, which is simple in structure and easy to implement. Specifically, the second gear transmission assembly 420 includes a third transmission gear 421 and a fourth transmission gear 422, the third transmission gear 421 is connected to the output end of the second driving motor 410, and the fourth transmission gear 422 is sleeved on the support body 210 and coaxially connected with the second support 230.

[0040] It should be noted that in some other embodiments, the second gear transmission assembly 420 can also be replaced by a synchronous belt transmission assembly, which is not limited here.

[0041] It should be noted that in some embodiments, a first adjusting assembly is arranged between the second support 230 and the two second cooling nozzles 240, and the first adjusting assembly is used to adjust the horizontal distance between the two second cooling nozzles 240, so as to adapt to different wall thicknesses of the curved thin-walled b.

[0042] Referring to Figure 1In some embodiments, the first adjusting assembly includes an adjusting member 510, a screw 520, and two sets of connecting rod assemblies. The adjusting member 510 is in the shape of a ring and is coaxially sleeved on the support main body 210 to slide up and down. The screw 520 is arranged on the adjusting member 510 and is screwed to the adjusting member 510. Two outwardly extending connecting portions 231 are arranged on the second support 230 corresponding to the two second cooling nozzles 240. A set of connecting rod assemblies is arranged between each connecting portion 231 and the corresponding second cooling nozzle 240. The connecting rod assemblies include a first connecting rod 531 and a second connecting rod 532. One end of the first connecting rod 531 is hinged to the end of the corresponding connecting portion 231 away from the second support 230. The other end of the first connecting rod 531 is hinged to the corresponding second cooling nozzle 240. One end of the second connecting rod 532 is hinged to the adjusting member 510. The other end of the second connecting rod 532 is hinged to the middle part of the first connecting rod 531. When the adjusting member 510 slides up and down, the two sets of connecting rod assemblies can drive the two second cooling nozzles 240 to move closer to or farther away from each other. The structure is simple and easy to implement. Specifically, the adjusting member 510 is sleeved on the second support 230 to slide up and down. During use, when the screw 520 is tightened, the end of the screw 520 can abut against the second support 230 to limit the up and down sliding of the adjusting member 510. When the screw 520 is loosened, the end of the screw 520 can be separated from the second support 230 to allow the adjusting member 510 to slide up and down.

[0043] It should be noted that in some other embodiments, the adjusting member 510 and the second connecting rod 532 can also be replaced by a pneumatic cylinder. The cylinder barrel of the pneumatic cylinder is hinged to the second support 230. The piston rod of the pneumatic cylinder is hinged to the middle part of the first connecting rod 531.

[0044] Referring to Figure 1 In some embodiments, a linear extension and retraction drive 600 is arranged between the connecting portion 231 and the corresponding second cooling nozzle 240. One end of the linear extension and retraction drive 600 is hinged to the end of the corresponding connecting portion 231 away from the second support 230. The other end of the linear extension and retraction drive 600 is hinged to the corresponding second cooling nozzle 240. The second cooling nozzle 240 and the corresponding linear extension and retraction drive 600 have a first hinge point. The same second cooling nozzle 240 and the corresponding first connecting rod 531 have a second hinge point. The first hinge point and the second hinge point are arranged at intervals to allow the linear extension and retraction drive 600 to adjust the angle of the corresponding second cooling nozzle 240 to adapt to different cooling needs. Specifically, the linear extension and retraction drive 600 is a drive structure such as a pneumatic cylinder or an electric push rod that can be controlled by a background control system.

[0045] It should be noted that in some embodiments, a second adjusting assembly is arranged between the first support 100 and the cooling assembly, and the second adjusting assembly is used to adjust the horizontal distance between the cooling assembly and the welding torch a, so as to adjust the lag distance between the cooling assembly and the molten area of the curved thin wall b.

[0046] With reference to Figure 1 In some embodiments, the second adjusting assembly comprises a first guide rail 710, a first sliding block 720, a first lead screw 730 and a third driving motor 740. The first guide rail 710 is arranged in a horizontal direction, one end of the first guide rail 710 is arranged on the first support 100, the first sliding block 720 is slidingly connected to the first guide rail 710, the first lead screw 730 is arranged on the first guide rail 710, the nut of the first lead screw 730 is fixedly connected to the first sliding block 720, and the third driving motor 740 is arranged on the first guide rail 710. The output end of the third driving motor 740 is connected to the screw rod of the first lead screw 730, so that the third driving motor 740 can drive the first sliding block 720 to slide along the first guide rail 710. The supporting body 210 is fixedly connected to the first sliding block 720, which is simple in structure and easy to implement.

[0047] It should be noted that in some other embodiments, the second adjusting assembly can also be replaced by a linear guide rail or a synchronous belt type linear module, which is not limited here.

[0048] It should be noted that in some embodiments, a third adjusting assembly is arranged between the first support 100 and the cooling assembly, and the third adjusting assembly is used to adjust the height of the cooling assembly, so as to adjust the vertical distance between the cooling assembly and the upper surface of the formed part of the curved thin wall b.

[0049] With reference to Figure 1 In some embodiments, the third adjusting assembly comprises a second guide rail 810, a second sliding block 820, a second lead screw 830 and a fourth driving motor 840. The second guide rail 810 is arranged in a vertical direction, and the second guide rail 810 is fixedly connected to the first support 100. The second sliding block 820 is slidingly connected to the second guide rail 810. The second lead screw 830 is arranged on the second guide rail 810, and the nut of the second lead screw 830 is fixedly connected to the second sliding block 820. The fourth driving motor 840 is arranged on the second guide rail 810, and the output end of the fourth driving motor 840 is connected to the screw rod of the second lead screw 830, so that the fourth driving motor 840 can drive the second sliding block 820 to slide along the second guide rail 810. The end of the first guide rail 710 is fixedly connected to the second sliding block 820, which is simple in structure and easy to implement.

[0050] It should be noted that in some other embodiments, the third adjusting assembly can also be replaced by a linear guide rail or a synchronous belt type linear module, which is not limited here.

[0051] The method for use according to the embodiments of the present application, applied to the electric arc additive manufacturing device described above, comprises the following steps:

[0052] S1, a three-dimensional model is established based on the curved thin wall b to be printed, and slicing and path planning are performed, a welding gun a motion program is generated, a control program of a cooling assembly is calculated and written according to the characteristics of the curved thin wall b and the printing cooling process, and the related programs are imported into a background control system;

[0053] S2, the welding gun a is moved to an initial position, the first cooling nozzle 220 and the two second cooling nozzles 240 are moved to the initial position, specifically, the horizontal distance between the first cooling nozzle 220 and the welding gun a and the height of the first cooling nozzle 220 relative to the printing substrate are adjusted to preset values, and the horizontal distance between the two second cooling nozzles 240 and the angle of the two second cooling nozzles 240 are adjusted to preset values;

[0054] S3, cooling gas is introduced into the first cooling nozzle 220 and the two second cooling nozzles 240, printing is started, the welding gun a is ignited and moves along the planned path, the first cooling nozzle 220 and the two second cooling nozzles 240 follow the rear side of the welding gun a to cool the formed part of the curved thin wall b, and the relative positions of the cooling assembly and the curved thin wall b are controlled according to the related programs during printing, specifically, including the distance of the first cooling nozzle 220 lagging behind the welding gun a, the horizontal distance between the two second cooling nozzles 240 and the side wall of the curved thin wall b, and the angle of the two second cooling nozzles 240;

[0055] S4, until the welding gun a completes the planned path, the curved thin wall b is printed, the welding gun a is turned off, the introduction of cooling gas into the first cooling nozzle 220 and the two second cooling nozzles 240 is stopped, each movable mechanical part is moved to the initial position, and the electric arc additive manufacturing process of the curved thin wall b is completed.

[0056] In the description of the present specification, if the description of the terms such as "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" and "some examples" is involved, it means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and otherwise changed by those skilled in the art without departing from the principles and spirit of the application. It is therefore intended that this application not be limited to the particular disclosure of the embodiments but that the application be given broadest scope in accordance with the following claims and their equivalents.

Claims

1. A cooling device, characterized in that, For mounting on a welding torch in an arc additive manufacturing equipment, including: A first bracket is used to mount the welding torch; A cooling assembly is disposed on a first bracket. The cooling assembly includes a support body, a first cooling nozzle, a second bracket, and two second cooling nozzles. The first cooling nozzle is disposed at the bottom of the support body, the second bracket is disposed on the support body, and the two second cooling nozzles are disposed on the second bracket. The two second cooling nozzles are respectively located on opposite sides of the first cooling nozzle. The horizontal distance between one second cooling nozzle and the first cooling nozzle is equal to the horizontal distance between the other second cooling nozzle and the first cooling nozzle. A first driving component is disposed on the welding torch and is capable of driving the cooling component to revolve around the axis of the welding torch as the rotation center line, so that the first cooling nozzle can always be located directly above the formed portion of the curved thin wall. The second driving component is disposed on the support body and can drive the two second cooling nozzles to revolve around the axis of the first cooling nozzle as the rotation center line, so that the two second cooling nozzles can always be located on the inner and outer sides of the formed part of the curved thin wall. A first adjustment component is provided between the second bracket and the two second cooling nozzles, and the first adjustment component is used to adjust the horizontal distance between the two second cooling nozzles; A second adjustment component is provided between the first support and the cooling component, and the second adjustment component is used to adjust the horizontal distance between the cooling component and the welding torch.

2. The cooling device as described in claim 1, characterized in that, The first support is cylindrical and is rotatably coaxially mounted on the welding torch so that the axis of the first support is collinear with the axis of the welding torch. The first drive assembly includes a first drive motor and a first gear transmission assembly. The first drive motor is fixedly mounted on the welding torch, and the first gear transmission assembly is disposed between the output end of the first drive motor and the first support so that the first drive motor can drive the first support to rotate about the axis of the welding torch as the rotation center line.

3. The cooling device as described in claim 1, characterized in that, The supporting body is cylindrical, and the first cooling nozzle is coaxially disposed at the bottom of the supporting body so that the axis of the first cooling nozzle is collinear with the axis of the supporting body. The second bracket is cylindrical and is rotatably coaxially sleeved on the supporting body so that the axis of the second bracket is collinear with the axis of the supporting body. The second driving assembly includes a second driving motor and a second gear transmission assembly. The second driving motor is fixedly disposed on the supporting body, and the second gear transmission assembly is disposed between the output end of the second driving motor and the second bracket so that the second driving motor can drive the second bracket to rotate around the axis of the supporting body as the rotation center line.

4. The cooling device as described in claim 1, characterized in that, The first adjustment assembly includes an adjusting member, a screw, and two sets of connecting rod assemblies. The adjusting member is ring-shaped and can be slidably fitted onto the support body. The screw passes through the adjusting member and is threadedly connected to it. The second bracket has two outwardly extending connecting parts corresponding to the two second cooling nozzles. Each connecting part is connected to a set of connecting rod assemblies between itself and the corresponding second cooling nozzle. The connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the end of the corresponding connecting part away from the second bracket, and the other end of the first connecting rod is hinged to the corresponding second cooling nozzle. One end of the second connecting rod is hinged to the adjusting member, and the other end of the second connecting rod is hinged to the middle of the first connecting rod. When the adjusting member slides up and down, it can drive the two second cooling nozzles to move closer or further apart through the two sets of connecting rod assemblies.

5. The cooling device as described in claim 4, characterized in that, A linear telescopic actuator is provided between the connecting part and the corresponding second cooling nozzle. One end of the linear telescopic actuator is hinged to the end of the corresponding connecting part away from the second bracket, and the other end of the linear telescopic actuator is hinged to the corresponding second cooling nozzle. The second cooling nozzle and the corresponding linear telescopic actuator have a first hinge point, and the same second cooling nozzle and the corresponding first connecting rod have a second hinge point. The first hinge point and the second hinge point are spaced apart so that the linear telescopic actuator can adjust the angle of the corresponding second cooling nozzle.

6. The cooling device as claimed in claim 1, characterized in that, A third adjustment component is provided between the first bracket and the cooling component, and the third adjustment component is used to adjust the height of the cooling component.

7. An electric arc additive manufacturing device, characterized in that, It includes a welding torch and a cooling device as described in any one of claims 1 to 6.

8. A method of use, characterized in that, The method applied to the arc additive manufacturing equipment as described in claim 7 includes the following steps: S1. Based on the required curved thin wall, establish a three-dimensional model and perform slicing and path planning to generate a welding gun motion program. Calculate and write the control program for the cooling component based on the characteristics of the curved thin wall and the printing cooling process, and import the relevant program into the background control system. S2. Move the welding torch to the initial position, and move the first cooling nozzle and the two second cooling nozzles to the initial position; S3. Cooling gas is introduced into the first cooling nozzle and the two second cooling nozzles to start printing. The welding torch is arced and moves along the planned path. The first cooling nozzle and the two second cooling nozzles follow the back of the welding torch to cool the formed part of the curved thin wall. During the printing process, the relative position of the cooling components and the curved thin wall is controlled according to the relevant program. S4. Once the welding torch completes the planned path and the curved thin-wall printing is finished, turn off the welding torch, stop supplying cooling gas to the first cooling nozzle and the two second cooling nozzles, move all movable mechanical parts to their initial positions, and the arc additive manufacturing process of the curved thin-wall is complete.

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