A continuous feeding device for friction stir additive manufacturing and a friction stir additive manufacturing apparatus having the same

Abstract

The application discloses a continuous feeding device for friction stir additive and a friction stir additive equipment with the same, and belongs to the technical field of additive manufacturing. The continuous feeding device for friction stir additive comprises a plurality of feeding mechanisms which are arranged at intervals in the vertical direction. The feeding mechanism comprises a feeding seat and a driving rod. At least a part of the driving rod is a reciprocating screw rod. The feeding seat is in threaded cooperation with the driving rod. The feeding seat is provided with a feeding port and a clamping piece. The clamping piece is installed on the feeding seat and is suitable for clamping additive bars. The feeding ports of the feeding seats of the plurality of feeding mechanisms are opposite to each other. The driving rod comprises a threaded segment with threads. The threaded segment has a first end and a second end in the axial direction of the driving rod. The plurality of feeding mechanisms at least comprise a first feeding mechanism and a second feeding mechanism. The application can drive the feeding seat to reciprocate by using the reciprocating screw rod, and realizes the continuous feeding by alternately operating the feeding seat of the first feeding mechanism and the feeding seat of the second feeding mechanism.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and in particular to a continuous feeding device for friction stir additive manufacturing and friction stir additive manufacturing equipment having the same. Background Technology

[0002] Common raw materials for friction stir deposition manufacturing include rods, wires, and particles. Rod-based friction stir deposition manufacturing technology has the advantages of high efficiency, strong performance, and low cost. However, most of the current related technologies are discontinuous rod feeding deposition manufacturing technologies. Continuous rod feeding friction stir deposition manufacturing is urgently needed in the fields of large high-strength structural components and dissimilar metal deposition manufacturing, so it needs to be improved. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, one object of the present invention is to provide a continuous feeding device for friction stirring additive manufacturing, comprising a plurality of feeding mechanisms arranged vertically at intervals, wherein each feeding mechanism includes a feeding seat and a drive rod, at least a portion of the drive rod being a reciprocating lead screw, the feeding seat being threadedly engaged with the drive rod, the feeding seat being provided with a feeding port and a clamping member, the clamping member being mounted on the feeding seat and adapted to clamp additive bar stock, and the feeding ports of the feeding seats of the plurality of feeding mechanisms being directly opposite each other;

[0005] The drive rod includes a threaded segment with threads, the threaded segment having a first end and a second end along the axial direction of the drive rod. The plurality of feeding mechanisms include at least a first feeding mechanism and a second feeding mechanism. When the feeding seat of the first feeding mechanism moves to the first end of the threaded segment of the drive rod of the first feeding mechanism, the feeding seat of the second feeding mechanism is located at the second end of the threaded segment of the drive rod of the second feeding mechanism, and / or, when the feeding seat of the first feeding mechanism moves to the second end of the threaded segment of the drive rod of the first feeding mechanism, the feeding seat of the second feeding mechanism is located at the first end of the threaded segment of the drive rod of the second feeding mechanism.

[0006] Based on the above technical features, this application can use a reciprocating screw to drive the feeding seat to reciprocate. By setting a first feeding mechanism and a second feeding mechanism, the feeding seats of the first feeding mechanism and the second feeding mechanism can operate alternately to achieve continuous feeding.

[0007] Optionally, the feeding mechanism further includes a guide rod, which is arranged parallel to and spaced apart from the drive rod. The feeding seat is loosely fitted onto the guide rod so that the feeding seat and the guide rod slide together.

[0008] Optionally, the drive rod of the first feeding mechanism is connected to the guide rod of the second feeding mechanism or is an integral structure, and the drive rod of the second feeding mechanism is connected to the guide rod of the first feeding mechanism or is an integral structure.

[0009] Optionally, it also includes a drive unit, which is dynamically coupled to a drive rod and / or a guide rod.

[0010] Optionally, it also includes a drive device, the output end of which is located on the side of the second feeding mechanism away from the first feeding mechanism, and multiple drive rods are all dynamically coupled to the drive device.

[0011] Optionally, it also includes a drive gear and multiple transmission gears. The drive gear is poweredly coupled to the output end of the drive device, and the transmission gears mesh with the drive gear. The multiple transmission gears are arranged in a one-to-one correspondence with multiple drive rods.

[0012] Optionally, the drive gear includes a meshing part and a pulley part, the meshing part and the pulley part are coaxial and fixedly connected, the meshing part meshes with the transmission gear, and the pulley part is dynamically coupled to the drive device through a transmission belt.

[0013] Optionally, it also includes a frame with a receiving space formed inside the frame, a feeding mechanism installed in the receiving space, a drive unit installed outside the frame, and a drive gear and a transmission gear installed in the frame and located outside the receiving space.

[0014] Optionally, the feeding mechanism further includes a lower limit detection element and an upper limit detection element, wherein the lower limit detection element is used to detect whether the feeding seat is located at the first end, and the upper limit detection element is used to detect whether the feeding seat is located at the second end.

[0015] Optionally, when the lower limit detection element of the first feeding mechanism detects that the feeding seat of the first feeding mechanism has moved to the first end, and the upper limit detection element of the second feeding mechanism detects that the feeding seat of the second feeding mechanism has moved to the second end, the clamping member of the second feeding mechanism is first controlled to clamp the bar stock, and then the clamping member of the first feeding mechanism is controlled to release the bar stock; or, when the lower limit detection element of the second feeding mechanism detects that the feeding seat of the second feeding mechanism has moved to the first end, and the upper limit detection element of the first feeding mechanism detects that the feeding seat of the first feeding mechanism is located at the second end, the clamping member of the first feeding mechanism is first controlled to clamp the bar stock, and then the clamping member of the second feeding mechanism is controlled to release the bar stock.

[0016] Optionally, the feeding mechanism further includes a lower origin detection element and an upper origin detection element, with the lower limit detection element, lower origin detection element, upper origin detection element, and upper limit detection element arranged vertically at intervals; the lower origin detection element is used to detect whether the feeding seat is located at the lower origin position, and the upper origin detection element is used to detect whether the feeding seat is located at the upper origin position; the distance between the feeding seat at the lower origin position and the feeding seat at the first end is d1, and the distance between the feeding seat at the upper origin position and the feeding seat at the second end is d2, where d1 = d2; in the initial state, the feeding seat of the first feeding mechanism is located at the lower origin position and the feeding seat of the second feeding mechanism is located at the upper origin position, or, in the initial state, the feeding seat of the first feeding mechanism is located at the upper origin position and the feeding seat of the second feeding mechanism is located at the lower origin position.

[0017] Another object of the present invention is to provide a continuously feeding friction stir additive manufacturing device, which includes the above-mentioned continuous feeding device.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of a continuous feeding device according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a reciprocating lead screw according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the continuous feeding device.

[0023] Figure 4 This is another schematic diagram of the continuous feeding device.

[0024] Figure label:

[0025] Frame 1; partition plate 2; bar stock 9; main shaft 10; mixing head 11;

[0026] Feeding mechanism 100; First feeding mechanism 100a; Second feeding mechanism 100b;

[0027] Feeder seat 110; clamping component 111; drive rod 120; reciprocating lead screw 121; first end 121a; second end 121b;

[0028] Lower limit detection element 130; Upper limit detection element 140; Lower origin detection element 150; Upper origin detection element 160;

[0029] Drive unit 200; drive gear 210; transmission gear 220. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The core of rod-based friction stir deposition manufacturing lies in feeding a rotating additive rod onto a substrate or the surface of an existing deposit. These additive rods undergo intense friction with the substrate or existing deposit, generating frictional heat and plastic deformation heat, thus plastically softening the additive rod. Under the forging pressure of the shoulder, the plasticized material bonds with the substrate or existing deposit to form a deposited layer. As the stirring head moves, new deposited layers are continuously added on top of the existing deposited layers, ultimately forming a three-dimensional solid part.

[0032] like Figure 1 As shown, friction stir additive manufacturing equipment typically includes a movable spindle 10, which is equipped with a rotatable stirring head 11. The spindle 10 drives the stirring head 11 and the additive rod 9 to rotate, rubbing against the surface of a substrate or a deposited layer, thereby achieving deposition manufacturing.

[0033] According to the background art, continuous feeding friction stir deposition manufacturing is urgently needed in the fields of large high-strength structural parts and dissimilar metal deposition manufacturing. Therefore, this application proposes a continuous feeding device for friction stir additive manufacturing.

[0034] like Figure 1 and Figure 2As shown, the continuous feeding device for friction stir additive manufacturing of this application includes multiple feeding mechanisms 100, which are arranged vertically at intervals. Each feeding mechanism 100 includes a feeding seat 110 and a drive rod 120. At least a portion of the drive rod 120 is a reciprocating lead screw 121. The feeding seat 110 is threadedly engaged with the drive rod 120. Each feeding seat 110 is provided with a feeding port and a clamping member 111. The clamping member 111 is installed on the feeding seat 110 and is suitable for clamping the additive bar material 9. The feeding ports of the feeding seats 110 of the multiple feeding mechanisms 100 are directly opposite each other. Each feeding mechanism 100 includes at least a first feeding mechanism 100a and a second feeding mechanism 100b. The drive rod 120 includes a threaded... The threaded segment has a first end 121a and a second end 121b along the axial direction of the drive rod 120. When the feed seat 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded segment of the drive rod 120 of the first feeding mechanism 100a, the feed seat 110 of the second feeding mechanism 100b is located at the second end 121b of the threaded segment of the drive rod 120 of the second feeding mechanism 100b; when the feed seat 110 of the first feeding mechanism 100a moves to the second end 121b of the threaded segment of the drive rod 120 of the first feeding mechanism 100a, the feed seat 110 of the second feeding mechanism 100b is located at the first end 121a of the threaded segment of the drive rod 120 of the second feeding mechanism 100b.

[0035] It is understandable that... Figure 1 and Figure 2 As shown, the reciprocating screw 121 typically has two threaded grooves with the same pitch but opposite directions, connected at both ends by a transition curve. The feed seat 110 is threadedly engaged with the drive rod 120, specifically with the threaded section of the drive rod 120. This threaded section has a first end 121a and a second end 121b along the axial direction of the drive rod 120. Thus, during rotation, the reciprocating screw 121's threaded engagement with the feed seat 110 allows the feed seat 110 to reciprocate between the first end 121a and the second end 121b. Specifically, after moving to the first end 121a, the feed seat 110 will turn towards the second end 121b, and after moving to the second end 121b, it will turn towards the first end 121a. This application achieves the reciprocating motion of the feed seat 110 without requiring motor reversal by configuring the reciprocating screw 121.

[0036] The feeder 110 is also provided with a clamping member 111, which can be in a clamping state and a releasing state. When the clamping member 111 is in the clamping state, that is, when the clamping member 111 clamps the additive bar 9, the reciprocating screw 121 can drive the feeder 110 to move along the axis of the additive bar 9 toward the substrate, that is, the feeding direction, so as to feed the mixing head 11.

[0037] To achieve continuous feeding, the characteristics of the reciprocating lead screw 121 can be utilized. Specifically, at least a first feeding mechanism 100a and a second feeding mechanism 100b can be configured. When the feeding seat 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded section of the drive rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b of the threaded section of the drive rod 120 of the second feeding mechanism 100b. Conversely, when the feeding seat 110 of the second feeding mechanism 100b moves to the first end 121a of the threaded section of the drive rod 120 of the second feeding mechanism 100b, the feeding seat 110 of the first feeding mechanism 100a is located at the second end 121b of the threaded section of the drive rod 120 of the first feeding mechanism 100a.

[0038] Specifically, the threaded section of the reciprocating lead screw 121 on the drive rod 120, with its second end 121b and first end 121a, can be arranged along the feeding direction, or in the opposite direction. For ease of description, unless otherwise specified, in the following text, the second end 121b and the first end 121a of the threaded section are arranged along the feeding direction.

[0039] Similarly, the second feeding mechanism 100b and the first feeding mechanism 100a can be arranged along the feeding direction or in the opposite direction. For ease of description, unless otherwise specified, the second feeding mechanism 100b and the first feeding mechanism 100a are arranged at intervals along the feeding direction in the following content.

[0040] like Figures 1-3 As shown, when the clamping member 111 of the first feeding mechanism 100a clamps the bar stock 9 and moves to the first end 121a via the feeding seat 110 of the first feeding mechanism 100a, the clamping member 111 of the second feeding mechanism 100b is in a released state and moves to the second end 121b via the feeding seat 110 of the second feeding mechanism 100b. Then, the clamping member 111 of the second feeding mechanism 100b clamps the bar stock 9 and moves to the first end 121a via the feeding seat 110 of the second feeding mechanism 100b, while the clamping member 111 of the first feeding mechanism 100a is in a released state and moves to the second end 121b via the feeding seat 110 of the first feeding mechanism 100a. This cycle repeats to achieve continuous feeding of the bar stock 9.

[0041] This application enables the reciprocating motion of the feeder 110 without the need for motor reversal by setting the reciprocating screw 121, thereby achieving continuous feeding. Its structure is simple and reliable.

[0042] In one embodiment, the drive rod 120 of the first feeding mechanism 100a and the drive rod 120 of the second feeding mechanism 100b can be driven by drive devices 200 respectively, so as to control the rotation of the drive rod 120 of the first feeding mechanism 100a and the drive rod 120 of the second feeding mechanism 100b, thereby controlling the feeding seat 110 of the first feeding mechanism 100a and the feeding seat 110 of the second feeding mechanism 100b to move alternately.

[0043] In one embodiment, the drive rod 120 of the first feeding mechanism 100a and the drive rod 120 of the second feeding mechanism 100b can be connected and coaxially arranged. The threaded sections of the drive rod 120 of the second feeding mechanism 100b and the threaded sections of the drive rod 120 of the first feeding mechanism 100a can be spaced apart along the feeding direction. Thus, a single drive device 200, such as a drive motor, can be used to drive the drive rods 120 of the first feeding mechanism 100a and the second feeding mechanism 100b to rotate simultaneously. This application uses a single motor to drive the movement of the two feeding seats, achieving alternating feeding. The thrust is constant and there are no abrupt changes, ensuring stable deposition parameters during friction stir deposition.

[0044] In the above embodiments, the feeding mechanism 100 may also be provided with a guide rod, which is arranged parallel to and spaced apart from the drive rod 120. The feeding seat 110 is loosely fitted onto the guide rod, so that the feeding seat 110 and the guide rod slide together. This makes the movement of the feeding seat more stable.

[0045] In one embodiment, the drive rods 120 of the first feeding mechanism 100a and the second feeding mechanism 100b can be staggered. For example, the first feeding mechanism 100a can be provided with at least two drive rods 120, and the second feeding mechanism 100b can be provided with at least two drive rods 120. The arrangement of multiple drive rods 120 can share the pressure of the feeding seat, which is beneficial to extending the service life of the drive rods 120.

[0046] In one embodiment, the feeding mechanism 100 may also be equipped with a guide rod, which is parallel to and spaced apart from the drive rod 120. The feeding seat 110 is loosely fitted onto the guide rod, allowing the feeding seat 110 to slide in cooperation with the guide rod. This makes the movement of the feeding seat more stable.

[0047] In the above embodiments, the drive rod 120 of the first feeding mechanism 100a and the guide rod of the second feeding mechanism 100b can be connected or form an integral structure, and the drive rod 120 of the second feeding mechanism 100b and the guide rod of the first feeding mechanism 100a can be connected or form an integral structure. It is understood that the drive rod 120 of the first feeding mechanism 100a and the guide rod of the second feeding mechanism 100b are connected to form a total drive rod 120, and the drive rod 120 of the second feeding mechanism 100b is connected to the guide rod of the first feeding mechanism 100a to form a total drive rod 120. This configuration of the drive rod allows it to both drive the two feeding seats 110 to move and guide them.

[0048] In the above embodiments, such as Figure 1 As shown, the continuous feeding device can be equipped with four main drive rods 120. Each feeding mechanism 100 includes two drive rods 120 and two guide rods, so that the feeding seat operates reliably and smoothly.

[0049] In the above embodiments, such as Figure 1 As shown, the continuous feeding device may further include a drive unit 200, which is dynamically coupled to the drive rod 120 and / or the guide rod. Thus, the drive unit 200 can drive the drive rod 120 and / or the guide rod to rotate, thereby moving the two feeding seats 110. In this way, a single drive unit 200, such as a single motor, can be used to drive the two feeding seats to move, achieving alternating feeding. The thrust magnitude remains constant without abrupt changes, ensuring stable deposition parameters during friction stir deposition.

[0050] In one embodiment, the output end of the drive device 200 is located on the side of the second feeding mechanism 100b away from the first feeding mechanism 100a, and multiple drive rods 120 are all power-coupled to the drive device 200.

[0051] In one embodiment, the continuous feeding device further includes a drive gear 210 and multiple transmission gears 220. The drive gear 210 is power-coupled to the output end of the drive device 200, and the transmission gears 220 mesh with the drive gear 210. Each of the multiple transmission gears 220 corresponds to one of the multiple drive rods 120. In a specific embodiment, the multiple drive rods 120 can extend to their corresponding transmission gears 220 and be fixedly connected to them. Thus, the above arrangement allows a single drive device 200 to simultaneously drive the multiple drive rods 120 to rotate.

[0052] The drive gear 210 may include a meshing part and a pulley part, which are coaxial and fixedly connected. The meshing part meshes with the transmission gear 220, and the pulley part is dynamically coupled to the drive device 200 via a transmission belt.

[0053] In one embodiment, the continuous feeding device further includes a frame 1, in which a receiving space is formed, a feeding mechanism 100 is installed in the receiving space, a drive device 200 is installed outside the frame 1, and a drive gear 210 and a transmission gear 220 are installed on the frame 1 and located outside the receiving space.

[0054] In one embodiment, the frame 1 also includes a partition 2 located within the receiving space and between two adjacent feeding mechanisms 100.

[0055] In one embodiment, the feeding mechanism 100 may further include a lower limit detection element 130 and an upper limit detection element 140. The upper limit detection element 140 and the lower limit detection element 130 are spaced apart on the frame 1 along the feeding direction. The lower limit detection element 130 is used to detect whether the feed seat 110 is located at the first end 121a, and the upper limit detection element 140 is used to detect whether the feed seat 110 is located at the second end 121b. When the lower limit detection element 130 detects that the feed seat 110 is located at the first end 121a, the clamping member 111 can be controlled to release the bar stock 9. When the upper limit detection element 140 detects that the feed seat 110 is located at the second end 121b, the clamping member 111 can be controlled to clamp the bar stock 9.

[0056] Thus, when the lower limit detection element 130 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a has moved to the first end 121a, the clamping member 111 of the first feeding mechanism 100a can be controlled to release the bar stock 9, and then the drive rod 120 of the first feeding mechanism 100a continues to rotate, driving the feeding seat 110 of the first feeding mechanism 100a to move toward the second end 121b. When the feeding seat 110 of the first feeding mechanism 100a is located at the first end 121a, the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b. When the upper limit detection element 140 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b, it controls the clamping member 111 of the second feeding mechanism 100b to clamp the bar 9. Then, the drive rod 120 of the second feeding mechanism 100b continues to rotate, driving the feeding seat 110 of the second feeding mechanism 100b to move toward the first end 121a.

[0057] Similarly, when the lower limit detection element 130 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is located at the first end 121a, it controls the clamping member 111 of the second feeding mechanism 100b to release the bar stock 9, and then the drive rod 120 of the second feeding mechanism 100b continues to rotate, causing the feeding seat 110 of the second feeding mechanism 100b to move toward the second end 121b. When the feeding seat 110 of the second feeding mechanism 100b is located at the first end 121a, the feeding seat 110 of the first feeding mechanism 100a is located at the second end 121b. When the upper limit detection element 140 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a is located at the second end 121b, it controls the clamping member 111 of the first feeding mechanism 100a to clamp the bar stock 9. Then, the drive rod 120 of the first feeding mechanism 100a continues to rotate, causing the feeding seat 110 of the first feeding mechanism 100a to move towards the first end 121a. In this way, one of the clamping members 111 of the first feeding mechanism 100a and the second feeding mechanism 100b will clamp the bar stock 9, thus realizing alternating continuous feeding.

[0058] In one embodiment, when the lower limit detection element 130 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a has moved to the first end 121a, and the upper limit detection element 140 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b has moved to the second end 121b, the clamping member 111 of the second feeding mechanism 100b can be controlled to clamp the bar stock 9 first, and then the clamping member 111 of the first feeding mechanism 100a can be controlled to release the bar stock 9. In this way, the bar stock 9 can be kept in a clamped state, ensuring the stability of the thrust on the bar stock 9, which is beneficial to improving the consistency and performance stability of the deposited material.

[0059] Similarly, when the lower limit detection element 130 of the second feeding mechanism 100b detects that the feeding seat 110 of the second feeding mechanism 100b is located at the first end 121a, and the upper limit detection element 140 of the first feeding mechanism 100a detects that the feeding seat 110 of the first feeding mechanism 100a is located at the second end 121b, the clamping member 111 of the first feeding mechanism 100a can be controlled to clamp the bar stock 9 first, and then the clamping member 111 of the second feeding mechanism 100b can be controlled to release the bar stock 9, so that the bar stock 9 can always be kept in a clamped state.

[0060] In one embodiment, such as Figure 1 and Figure 4As shown, the feeding mechanism 100 also includes a lower origin detection element 150 and an upper origin detection element 160, and a lower limit detection element 130, a lower origin detection element 150, an upper origin detection element 160 and an upper limit detection element 140 are arranged at intervals in a direction opposite to the feeding direction.

[0061] The lower origin detection element 150 is used to detect whether the feeder 110 is located at the lower origin position, and the upper origin detection element 160 is used to detect whether the feeder 110 is located at the upper origin position. The distance between the feeder 110 at the lower origin position and the feeder 110 at the first end 121a is d1, and the distance between the feeder 110 at the upper origin position and the feeder 110 at the second end 121b is d2, where d1 = d2. In the initial state, the feeder 110 of the first feeding mechanism 100a can be located at the lower origin position and the feeder 110 of the second feeding mechanism 100b can be located at the upper origin position. Alternatively, in the initial state, the feeder 110 of the first feeding mechanism 100a can be located at the upper origin position and the feeder 110 of the second feeding mechanism 100b can be located at the lower origin position. This ensures that, during continuous feeding operation, when the feeding seat 110 of the first feeding mechanism 100a moves to the first end 121a of the threaded section of the drive rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is located at the second end 121b of the threaded section of the drive rod 120 of the second feeding mechanism 100b. Alternatively, when the feeding seat 110 of the first feeding mechanism 100a moves to the second end 121b of the threaded section of the drive rod 120 of the first feeding mechanism 100a, the feeding seat 110 of the second feeding mechanism 100b is located at the first end 121a of the threaded section of the drive rod 120 of the second feeding mechanism 100b.

[0062] In one embodiment, during continuous feeding operation, if the lower origin detection element 150 of the first feeding mechanism 100a and the upper origin detection element 160 of the second feeding mechanism 100b do not simultaneously detect that the feed seat 110 of the first feeding mechanism 100a is at the lower origin position, and the feed seat 110 of the second feeding mechanism 100b is at the upper origin position, a warning is issued. Alternatively, if the upper origin detection element 160 of the first feeding mechanism 100a and the lower origin detection element 150 of the second feeding mechanism 100b do not simultaneously detect that the feed seat 110 of the first feeding mechanism 100a is at the upper origin position, and the feed seat 110 of the second feeding mechanism 100b is at the lower origin position, a warning is issued. After receiving a warning, maintenance is required to avoid abnormalities during reversal.

[0063] In one embodiment, this application also proposes a continuously fed friction stir additive manufacturing apparatus. The continuously fed friction stir additive manufacturing apparatus includes the aforementioned continuous feeding device and a movable spindle 10. The spindle 10 is equipped with a rotatable stirring head 11, which has a stirring head receiving space for accommodating bar stock 9. The inlet of the stirring head receiving space is directly opposite to the feeding inlets of the feeding seats 110 of the plurality of feeding mechanisms 100. The continuous feeding device continuously feeds the stirring head 11, thus achieving continuous friction stir deposition manufacturing.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuous feeding device for friction stir additive manufacturing, characterized in that, The feeding mechanism comprises a plurality of feeding mechanisms vertically spaced, wherein the feeding mechanism comprises a feeding seat and a driving rod, at least part of the driving rod is a reciprocating screw rod, the feeding seat is threadedly connected with the driving rod, the feeding seat is provided with a feeding port and a clamping piece, the clamping piece is installed on the feeding seat and is adapted to clamp the additive bar, the feeding ports of the feeding seats of the plurality of feeding mechanisms are opposite to each other; the reciprocating screw rod has two thread grooves with the same pitch and opposite rotation directions, and the two ends are connected by a transition curve; Wherein, the plurality of feeding mechanisms at least comprises a first feeding mechanism and a second feeding mechanism, the driving rod comprises a threaded segment with a thread, the threaded segment has a first end and a second end along the axis direction of the driving rod, when the feeding seat of the first feeding mechanism moves to the first end of the threaded segment of the driving rod of the first feeding mechanism, the feeding seat of the second feeding mechanism is located at the second end of the threaded segment of the driving rod of the second feeding mechanism, and / or, when the feeding seat of the first feeding mechanism moves to the second end of the threaded segment of the driving rod of the first feeding mechanism, the feeding seat of the second feeding mechanism is located at the first end of the threaded segment of the driving rod of the second feeding mechanism; The feeding mechanism further comprises a guide rod, the guide rod is parallel and spaced apart from the driving rod, and the feeding seat is sleeved on the guide rod so that the feeding seat and the guide rod are in sliding fit; The driving rod of the first feeding mechanism is connected with the guide rod of the second feeding mechanism or is an integral structure, and the driving rod of the second feeding mechanism is connected with the guide rod of the first feeding mechanism or is an integral structure; Further comprising a driving device, the driving device is power coupled with the driving rod and / or the guide rod.

2. The apparatus of claim 1, wherein, Further comprising a driving device, the output end of the driving device is located on the side of the second feeding mechanism away from the first feeding mechanism, and a plurality of driving rods are power coupled with the driving device.

3. The apparatus of claim 2, wherein, Further comprising a driving gear and a plurality of transmission gears, the driving gear is power coupled with the output end of the driving device, the transmission gears are engaged with the driving gear, and a plurality of transmission gears are correspondingly arranged with a plurality of driving rods.

4. The apparatus of claim 3, wherein, The driving gear comprises an engagement part and a pulley part, the engagement part and the pulley part are coaxial and fixedly connected, the engagement part is engaged with the transmission gear, and the pulley part is power coupled with the driving device through a transmission belt.

5. The apparatus of claim 3, wherein, Further comprising a rack, the rack is formed with an accommodation space, the feeding mechanism is installed in the accommodation space, the driving device is installed outside the rack, and the driving gear and the transmission gear are installed on the rack and located outside the accommodation space.

6. The apparatus of claim 1, wherein, The feeding mechanism further comprises a lower limit detection element and an upper limit detection element, the lower limit detection element is used to detect whether the feeding seat is located at the first end, and the upper limit detection element is used to detect whether the feeding seat is located at the second end.

7. The apparatus of claim 6, wherein, When the lower limit detection element of the first feeding mechanism detects that the feeding seat of the first feeding mechanism moves to the first end, and the upper limit detection element of the second feeding mechanism detects that the feeding seat of the second feeding mechanism moves to the second end, the clamping member of the second feeding mechanism is controlled to clamp the bar first, and then the clamping member of the first feeding mechanism is controlled to release the bar; Or, when the lower limit detection element of the second feeding mechanism detects that the feeding seat of the second feeding mechanism moves to the first end, and the upper limit detection element of the first feeding mechanism detects that the feeding seat of the first feeding mechanism is located at the second end, the clamping member of the first feeding mechanism is controlled to clamp the bar first, and then the clamping member of the second feeding mechanism is controlled to release the bar.

8. The apparatus of claim 7, wherein, The feeding mechanism further comprises a lower origin detection element and an upper origin detection element, and the lower limit detection element, the lower origin detection element, the upper origin detection element and the upper limit detection element are vertically spaced apart; The lower origin detection element is used to detect whether the feeding seat is located at a lower origin position, and the upper origin detection element is used to detect whether the feeding seat is located at an upper origin position; The distance between the feeding seat at the lower origin position and the feeding seat at the first end is d1, and the distance between the feeding seat at the upper origin position and the feeding seat at the second end is d2, wherein d1=d2; In the initial state, the feeding seat of the first feeding mechanism is located at the lower origin position and the feeding seat of the second feeding mechanism is located at the upper origin position, or, in the initial state, the feeding seat of the first feeding mechanism is located at the upper origin position and the feeding seat of the second feeding mechanism is located at the lower origin position.

9. A continuous feeding friction stir additive manufacturing apparatus, characterized by, The continuous feeding device comprises: The continuous feeding device according to any one of claims 1-8.

Images