Stirring friction material adding device

Abstract

The utility model relates to the technical field of stirring friction material adding, in particular to a stirring friction material adding device which comprises a stirring body and a bearing part, the stirring body comprises a gas hood and a stirring part, a gas containing open cavity is formed in the gas hood, the gas hood is connected with the stirring part, at least part of the stirring part is located in the gas containing open cavity, and the bearing part is connected with the stirring part. The stirring part is used for stirring the friction additive; the bearing part is arranged opposite to the stirring body, a bearing face is arranged on the side, close to the stirring body, of the bearing part, and air outlet holes are formed in the bearing face and configured to be capable of conveying protective gas to the gas containing open cavity. According to the utility model, the bearing surface of the bearing part is provided with the air outlet holes for conveying the protective gas, so that mutual interference between the air injection component and other components of the stirring part can be avoided, and high finished product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of friction stir additive manufacturing, in particular to a friction stir additive manufacturing device. Background Art

[0002] Additive manufacturing technology manufactures solid parts by gradually adding materials. With the development of the aerospace field, in order to meet the production requirements for large-scale high-strength integral structural parts, friction stir additive manufacturing technology has been developed to manufacture lightweight alloy structural parts such as aluminum and magnesium alloys.

[0003] Friction stir additive manufacturing technology is a solid-phase non-melting additive manufacturing method based on friction stir welding technology. It generates heat through the rotation and movement friction of a stirring head, making the material plastically deformed and fused together. During the additive manufacturing process by friction stir additive manufacturing technology, defects such as pores and cracks generated during the melting and solidification processes of traditional additive manufacturing methods can be avoided, ensuring good mechanical properties in the additive zone.

[0004] When using materials such as aluminum and magnesium for friction stir additive manufacturing, they are prone to oxidation. To avoid oxidation affecting the product quality, during the friction stir additive manufacturing process, a jet component that moves synchronously with the stirring head is usually set up to spray a protective gas through the jet component to isolate the air from the material and prevent its oxidation. With the continuous improvement of friction stir additive manufacturing devices, more and more functional components are integrated on the existing stirring head, and the requirement for space utilization rate is getting higher and higher. The jet component is prone to interference with other functional components, resulting in both components being difficult to work properly and affecting the product quality. Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the present utility model is to overcome the interference between the jet component of the existing device and other components, which makes it difficult to work properly and affects the product quality, and to provide a friction stir additive manufacturing device that can avoid interference between the jet component and other components and ensure high product quality.

[0006] The present utility model provides a friction stir additive manufacturing device, including a stirring body, the stirring body includes an air hood and a stirring member, an air-containing opening cavity is formed in the air hood, the air hood is connected to the stirring member, at least a part of the stirring member is located in the air-containing opening cavity, and the stirring member is used for friction stir additive manufacturing; a carrier member, the carrier member is arranged opposite to the stirring body, a bearing surface is provided on the side of the carrier member close to the stirring body, and an air outlet hole is formed on the bearing surface, and the air outlet hole is configured to be able to convey a protective gas to the air-containing opening cavity.

[0007] In an embodiment of the present utility model, the air hood is configured to be telescopic relative to the carrier. The air hood includes an extended state, and in the extended state, the air hood can abut against the bearing surface to seal the opening of the air-containing cavity by the bearing surface.

[0008] In an embodiment of the present utility model, the wall of the air hood includes a plurality of folding parts connected at an angle, and the angle between two adjacent folding parts can be adjusted to achieve telescoping.

[0009] In an embodiment of the present utility model, the air hood includes a plurality of hood bodies connected in sequence, and adjacent hood bodies can move relative to each other to achieve telescoping.

[0010] In an embodiment of the present utility model, adjacent hood bodies are elastically and sealingly connected.

[0011] In an embodiment of the present utility model, the edge of the air hood on the side close to the carrier is provided with an extension part, and the extension part extends radially outward along the stirring member.

[0012] In an embodiment of the present utility model, the carrier is configured to be movable relative to the stirring body along the radial direction of the stirring member.

[0013] In an embodiment of the present utility model, it further includes a first driving member and a second driving member. The driving end of the first driving member is connected to the second driving member. The driving end of the first driving member can move along a first direction, and the first direction is perpendicular to the axial direction of the stirring member. The driving end of the second driving member is connected to the carrier, and the driving end of the second driving member can move along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the stirring member respectively.

[0014] In an embodiment of the present utility model, it further includes a third driving member. The driving end of the third driving member is connected to the stirring body, and the driving end of the third driving member can move along the axial direction of the stirring member.

[0015] In an embodiment of the present utility model, the stirring body further includes a cooling member, and the cooling member is connected to the stirring member.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] The friction stir additive manufacturing device described in the present utility model is provided with air vents on the bearing surface of the bearing member, which can cooperate with the air hood to prevent the material from oxidizing during the friction stir additive manufacturing process and ensure the high quality of the additive manufacturing product. Since the air vents are opened on the bearing member rather than the stirring member, the space of the stirring member is effectively saved, facilitating the installation of other functional components. In addition, it can also avoid the problem that the existing air pipes and air channels arranged on the stirring member are prone to interference with other components, ensuring that each component can work properly and achieving efficient and high-quality additive manufacturing. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is made according to the specific embodiments of the present utility model in conjunction with the attached drawings, wherein,

[0019] Figure 1 is a schematic structural diagram of the friction stir additive manufacturing device in the preferred embodiment of the present utility model;

[0020] Figure 2 is a partial structural diagram of the bearing member in the preferred embodiment of the present utility model;

[0021] Figure 3 is a schematic structural diagram of an air hood in the preferred embodiment of the present utility model;

[0022] Figure 4 is a schematic structural diagram of another air hood in the preferred embodiment of the present utility model;

[0023] Figure 5 is a schematic structural diagram of the bearing member in the preferred embodiment of the present utility model;

[0024] Figure 6 is a schematic structural diagram of the stirring member in the preferred embodiment of the present utility model.

[0025] Explanation of the reference numerals in the drawings of the specification: D1, the first direction; D2, the second direction; 10, the stirring body; 11, the air hood; 111, the air-containing opening cavity; 112, the folding part; 113, the hood body; 114, the extension part; 12, the stirring member; 121, the stirring shaft; 122, the cooling member; 20, the bearing member; 21, the bearing surface; 211, the air vent; 31, the first driving member; 32, the second driving member; 33, the third driving member. Detailed Embodiments

[0026] The following further description of the present utility model is made in conjunction with the attached drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0027] Refer to Figure 1 and Figure 2As shown in the figure, the utility model discloses a friction stir additive manufacturing device, which includes a stirring body 10 and a carrier 20.

[0028] The stirring body 10 is used to realize friction stir additive manufacturing. Specifically, the stirring body 10 includes an air hood 11 and a stirring member 12. An air-containing opening cavity 111 is formed in the air hood 11, and the opening of the air-containing opening cavity 111 faces the carrier 20. By providing the air hood 11, it is convenient to gather the protective gas and prevent the rapid escape of the protective gas so that it cannot protect the material, effectively ensuring the processing quality and achieving a certain energy-saving effect. The air hood 11 is connected to the stirring member 12, and those skilled in the art can set the connection method between the air hood 11 and the stirring member 12 according to actual needs, which will not be elaborated here. The stirring member 12 is used for friction stir additive manufacturing, and those skilled in the art can set the specific stirring member 12 according to actual needs to realize the feeding and friction stirring of materials such as powder materials, rod materials, and wire materials. At least part of the stirring member 12 is located in the air-containing opening cavity 111; those skilled in the art can set the stirring member 12 according to actual needs; preferably, the stirring member 12 is entirely arranged in the air-containing opening cavity 111 to facilitate better operation.

[0029] The carrier 20 is used to carry the corresponding additive manufacturing material and cooperate with the stirring body 10 to realize friction stir additive manufacturing. Specifically, the carrier 20 is arranged opposite to the stirring body 10, and a bearing surface 21 is provided on the side of the carrier 20 close to the stirring body 10 for bearing. An air outlet hole 211 is formed on the bearing surface 21, and the air outlet hole 211 is configured to be able to convey the protective gas to the air-containing opening cavity 111, thereby preventing the material from being oxidized during the friction stir additive manufacturing process and ensuring the high quality of the finished product. Protective gases such as argon, nitrogen, helium, etc. will not be elaborated here. Preferably, a gas cylinder is provided and the gas cylinder is connected to the air inlet of the air outlet hole 211 through a gas pipe to realize the conveyance of the protective gas. By forming the air outlet hole 211 on the bearing surface 21 and conveying the protective gas, the space at the carrier 20 is fully utilized to save the space of the stirring member 12, so as to be used for installing components such as detectors. It can not only realize the digitization and intelligentization of friction stir additive manufacturing to ensure the high efficiency and high quality of friction stir additive manufacturing, but also prevent interference between components and unable to work properly.

[0030] During use, the stirring member 12 in the air hood 11 performs friction stirring on the base material and the corresponding material on the bearing surface 21 to realize additive manufacturing. During the friction stir additive manufacturing process, the protective gas is ejected through the air outlet hole 211 on the bearing surface 21 to prevent the material from being oxidized and ensure the high quality of the additive manufacturing finished product.

[0031] For the friction stir additive manufacturing device of the present utility model, by providing air vents 211 on the bearing surface 21 of the carrier 20, it can cooperate with the air hood 11 to prevent the material from oxidizing during the friction stir additive manufacturing process, ensuring the high quality of the additive manufacturing product. Since the air vents 211 are provided on the carrier 20 instead of the stirring member 12, the space of the stirring member 12 is effectively saved, facilitating the installation of other functional components. In addition, it can also avoid the problem that the trachea and airway structures provided on the existing stirring member 12 are prone to interference with other components, ensuring that each component can work properly and achieving efficient and high-quality additive manufacturing.

[0032] Referring to Figure 1 As shown, in some embodiments of the friction stir additive manufacturing device of the present utility model, the air hood 11 is configured to be able to expand and contract relative to the carrier 20; those skilled in the art can set the specific telescopic structure of the air hood 11 according to actual needs, such as a flexible telescopic structure, a folding telescopic structure, etc. The air hood 11 includes an extended state. In the extended state, the air hood 11 can be in contact with the bearing surface 21 to seal the opening of the air-containing cavity 111 on the bearing surface 21, thus better realizing the gas protection for the formed part during the additive manufacturing process. Correspondingly, the air hood 11 includes a contracted state to facilitate operations such as material taking, maintenance, and assembly by the staff.

[0033] Furthermore, referring to Figure 3 As shown, in some embodiments of the friction stir additive manufacturing device of the present utility model, the wall of the air hood 11 includes a plurality of folding parts 112 connected at an angle. The angle between two adjacent folding parts 112 can be adjusted to achieve expansion and contraction. This "bellows-type" structure enables the air hood 11 to expand and contract relative to the carrier 20, and can also effectively achieve the airtight protection of the gas atmosphere for the formed part. In addition, when the carrier 20 moves relatively, the air hood 11 of this structure can also swing synchronously with the carrier 20, having good motion adaptability and being able to better ensure its sealing effect.

[0034] Furthermore, referring to Figure 4As shown, in some embodiments of the friction stir additive manufacturing device of the present utility model, the gas hood 11 includes a plurality of hood bodies 113. The plurality of hood bodies 113 are connected in sequence, and relative movement can occur between two adjacent hood bodies 113 to achieve expansion and contraction. This "pagoda-style" structure enables the gas hood 11 to expand and contract relative to the carrier 20, and at the same time can effectively achieve the airtight protection of the formed part. It should be noted that those skilled in the art can set the specific size of the hood body 113 according to actual needs. For example, when the gas hood 11 is in the extended state, from the end far from the carrier 20 to the end close to the carrier 20, the sizes of the respective hood bodies 113 gradually decrease or gradually increase. Those skilled in the art can set the connection structure between the hood bodies 113 according to actual needs to ensure the sealing effect of the gas hood 11. Preferably, the two adjacent hood bodies 113 are elastically sealed and connected. Elastic sealing connection belongs to the prior art, and those skilled in the art can set different elastic sealing connection structures according to actual needs, which will not be elaborated here. By setting the adjacent hood bodies 113 to be elastically sealed and connected, when the carrier 20 makes relative movement, the gas hood 11 can also swing synchronously with the carrier 20, having good movement adaptability and being able to better ensure its sealing effect.

[0035] Further, referring to Figure 3 and Figure 4 As shown, in some embodiments of the friction stir additive manufacturing device of the present utility model, the edge of the gas hood 11 on the side close to the carrier 20 is provided with an extension part 114, and the extension part 114 extends radially outward along the stirring member 12. By providing the extension part 114, when the opening of the air-containing cavity 111 cooperates with the bearing surface 21 to be airtight, the path of gas dissipation can be extended to increase the difficulty of its dissipation, so as to better achieve gas protection and save energy consumption at the same time.

[0036] In some embodiments of the friction stir additive manufacturing device of the present utility model, the carrier 20 is configured to be able to move relative to the stirring body 10 along the radial direction of the stirring member 12. In the prior art, devices such as robotic arms and three-axis drivers are usually used to achieve three-dimensional driving of the stirring member 12 and realize friction stir additive manufacturing. However, such structures will occupy a certain space and reduce the overall space utilization rate of the device. By setting the carrier 20 as a movable structure, the idle space at the carrier 20 can be utilized, thereby saving the space at the stirring member 12. Those skilled in the art can set the specific driving structure of the carrier 20 according to actual needs to achieve its radial movement relative to the stirring member 12.

[0037] Further, referring to Figure 5As shown, in some embodiments, the friction stir additive manufacturing device of the present utility model further includes a first driving member 31 and a second driving member 32. The driving end of the first driving member 31 is connected to the second driving member 32. The driving end of the first driving member 31 can move along a first direction D1, and the first direction D1 is perpendicular to the axial direction of the stirring member 12. The driving end of the second driving member 32 is connected to the carrier 20. The driving end of the second driving member 32 can move along a second direction D2, and the second direction D2 is perpendicular to the first direction D1 and the axial direction of the stirring member 12 respectively. Those skilled in the art can set different driving members according to actual needs; preferably, both the first driving member 31 and the second driving member 32 are set as a combination of a servo motor and a lead screw (the servo motor and the lead screw are not shown in the figure) to facilitate high-precision driving. Preferably, a guide rail is also provided to provide guidance for the driving and increase the structural stiffness and stability. By setting this structure, the carrier 20 can move relative to the stirring member 12 to achieve friction stir additive manufacturing. The space at the carrier 20 is fully utilized to save the space of the stirring member 12, facilitate the setting of other mechanisms and components, prevent interference problems, and improve the stability of the device.

[0038] Further, referring to Figure 1 As shown, in some embodiments, the friction stir additive manufacturing device of the present utility model further includes a third driving member 33. The driving end of the third driving member 33 is connected to the stirring body 10. The driving end of the third driving member 33 can move along the axial direction of the stirring member 12. Those skilled in the art can set different third driving members 33 according to actual needs; preferably, the third driving member 33 is set as a combination of a servo motor and a lead screw to facilitate high-precision driving. Preferably, a guide rail is also provided to provide guidance for the driving and increase the structural stiffness and stability. By setting the third driving member 33, three-dimensional friction stir additive manufacturing can be achieved in cooperation with the first driving member 31 and the second driving member 32.

[0039] In some embodiments of the friction stir additive manufacturing device of the present utility model, the stirring member 12 includes a stirring shaft 121 and a detector. The detector is configured to be able to measure the upsetting force and / or temperature of the stirring shaft 121. The detector belongs to the prior art, and the working principle of how it measures the upsetting force and temperature parameters will not be elaborated. By setting the detector, an intelligent tool holder can be formed with the stirring shaft 121 to measure the corresponding parameters in the friction stir additive manufacturing process in real time, so as to cooperate with the modeling calculation and feedback adjustment of the corresponding system to achieve intelligent control of the additive manufacturing process. The stirring shaft 121 belongs to the prior art. Those skilled in the art can set corresponding shoulders, feeding mechanisms, rotation driving mechanisms, etc. for the stirring shaft 121 according to actual needs, which will not be elaborated. Preferably, a digital model dissection and digital twin module is also provided. This module also belongs to the prior art and can digitize the additive product model and visualize the additive manufacturing process to achieve the twin comparison between the theoretical model and the processing process.

[0040] Referring to Figure 6 As shown, in some embodiments of the friction stir additive manufacturing device of the present utility model, the stirring body 10 further includes a cooling member 122, and the cooling member 122 is connected to the stirring member 12. Those skilled in the art can set different cooling members 122 according to actual needs; preferably, the cooling member 122 is set as a liquid-cooled type. By providing the cooling member 122, it is possible to cool the stirring member 12 and effectively prevent the heat generated during the friction stir additive manufacturing process from affecting the material, so as to avoid blockage and ensure high processing quality.

[0041] Working principle:

[0042] After the corresponding base material and material are prepared, under the drive of the third driving member 33, the stirring body 10 approaches the bearing surface 21. The air hood 11 extends out and contacts the bearing surface 21 to seal the opening of the air-containing cavity 111; at the same time, the air outlet hole 211 of the bearing surface 21 ejects a protective gas to isolate oxygen. Subsequently, with the cooperation of the first driving member 31, the second driving member 32, the third driving member 33 and the stirring member 12, friction stir additive manufacturing is achieved. During the process of friction stir additive manufacturing, the detector, digital-analog dissection and digital twin module work to achieve intelligent control of the friction stir additive manufacturing process.

[0043] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the present utility model.

Claims

1. A friction stir additive manufacturing device, characterized in that, Comprising: A stirring body, the stirring body includes an air hood and a stirring member. An air-containing opening cavity is formed inside the air hood. The air hood is connected to the stirring member. At least a part of the stirring member is located inside the air-containing opening cavity, and the stirring member is used for stirring and friction additive manufacturing. A bearing member, the bearing member is arranged relative to the stirring body. The bearing member is provided with a bearing surface on the side close to the stirring body. An air outlet hole is formed on the bearing surface, and the air outlet hole is configured to be able to convey a protective gas to the air-containing opening cavity.

2. The friction stir additive manufacturing device according to claim 1, characterized in that: The air hood is configured to be able to expand and contract relative to the bearing member. The air hood includes an extended state. In the extended state, the air hood can be abutted against the bearing surface so that the bearing surface seals the opening of the air-containing opening cavity.

3. The friction stir additive manufacturing device according to claim 2, wherein: The wall of the air hood includes a plurality of folding parts connected at an angle, and the angle between two adjacent folding parts can be adjusted to achieve expansion and contraction.

4. The friction stir additive manufacturing device according to claim 2, wherein: The air hood includes a plurality of hood bodies, and the plurality of hood bodies are connected in sequence. Relative movement between two adjacent hood bodies can be achieved to realize expansion and contraction.

5. The friction stir additive manufacturing device according to claim 4, wherein: Elastic sealing connection is provided between two adjacent hood bodies.

6. The friction stir additive manufacturing device according to any one of claims 2 to 5, characterized in that: An extension part is provided at the edge of the air hood close to the bearing member, and the extension part extends radially outward along the stirring member.

7. The friction stir additive manufacturing device according to claim 1, wherein: The bearing member is configured to be able to move relative to the stirring body along the radial direction of the stirring member.

8. The friction stir additive manufacturing device according to claim 7, characterized in that, It further includes a first driving member and a second driving member. The driving end of the first driving member is connected to the second driving member. The driving end of the first driving member can move along a first direction, and the first direction is perpendicular to the axial direction of the stirring member. The driving end of the second driving member is connected to the bearing member, and the driving end of the second driving member can move along a second direction, and the second direction is perpendicular to the first direction and the axial direction of the stirring member respectively.

9. The friction stir additive manufacturing device according to claim 7 or 8, characterized in that, It further includes a third driving member, and the driving end of the third driving member is connected to the stirring body. The driving end of the third driving member can move along the axial direction of the stirring member.

10. The friction stir additive manufacturing device according to claim 1, wherein: The stirring body further includes a cooling member, and the cooling member is connected to the stirring member.

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