Stick feeding mechanism and transfer mechanism and pressing mechanism for friction stir additive

Abstract

The utility model relates to the field of friction stir additive technology, concretely is the bar material feeding mechanism and transfer mechanism and pressing mechanism for friction stir additive. The utility model discloses mounting support, the positioning groove of containing and radial limit bar material and the lifting lifting assembly for lifting bar material in the upward sliding of positioning groove are set on mounting support, the upper section groove body of positioning groove has the one -way buckle of swing installation, the one -way buckle has the avoidance state of avoiding bar material when swing to the cavity of positioning groove groove to avoid, and the normality of resetting to the inside of positioning groove, when sliding to exceed the given position after bar material lower extreme, one -way buckle can be normality reset or completely reset to normality, to lift bar material when lifting lifting assembly and bar material separate. The utility model not only need not the power source of feeding mechanism to continuously lift bar material, but also can effectively shorten the time interval of feeding again after bar material transfer on the feeding mechanism is finished.

Description

Technical Field

[0001] This utility model relates to the field of friction stir additive manufacturing technology, specifically to a rod feeding mechanism, a transfer mechanism, and a pressing mechanism for friction stir additive manufacturing. Background Technology

[0002] In friction stir additive manufacturing (FSM) spindles, the additive material is mostly aluminum-based and is manufactured in the form of rods to achieve continuous feeding during the additive manufacturing process. After the rods are used up, they need to be replenished. Because the FSM device is relatively tall and the rod inlet is located at the top of the device, replenishing the rods often requires a feeding mechanism to transport them to a higher position, and then a transfer mechanism to move the rods back to the inlet. Most current bar feeding and conveying mechanisms, as described in the Chinese Patent Publication No. CN119328288A entitled "An Additive Manufacturing Device and Method for Friction Stir Welding," are equipped with a feeding mechanism capable of holding bars. After the feeding mechanism loads the bars, it rises and uses a transfer mechanism to transfer the bars to the top of the shaft, i.e., the feed inlet of the main shaft of the friction stir welding additive manufacturing process, and then releases the bars to complete the feeding. After the bars on the feeding mechanism have been transferred, the feeding mechanism descends again and reloads the bars, repeating the aforementioned steps.

[0003] While the aforementioned cited patents can achieve semi-automatic feeding, the method of continuously maintaining a lifting and lowering state of the feeding mechanism during the feeding process, and waiting for the transfer mechanism to complete the transfer of the bars before lowering to perform the bar loading operation, has the following problems. On the one hand, the continuous lifting of the feeding mechanism causes its lifting power source to remain in a continuous working state, which will continuously consume energy and reduce the service life of the power source; on the other hand, after the bars on the feeding mechanism have been transferred, the feeding mechanism needs to complete the lowering of the feeding mechanism, the loading of bars by the feeding mechanism, and the feeding mechanism needs to rise again to lift the bars before it can feed materials to the transfer mechanism again. This obviously results in a long waiting time for the feeding mechanism to perform feeding again, and therefore urgently needs to be solved. Utility Model Content

[0004] In order to avoid and overcome the technical problems existing in the prior art, this utility model provides a rod feeding mechanism, a transfer mechanism and a pressing mechanism for friction stirring additive manufacturing. It not only eliminates the need for a power source to continuously lift the rod in the feeding mechanism, but also effectively shortens the time interval between feeding the rod again after the rod has been transferred on the feeding mechanism.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rod feeding mechanism for friction stir additive manufacturing includes a mounting bracket, a positioning groove on the mounting bracket for accommodating and radially limiting the rod, and a lifting and lifting assembly for supporting the rod to slide upward within the positioning groove. A one-way latch is movably installed in the upper section of the positioning groove. When in motion, the one-way latch has a clearance state where it moves out of the positioning groove cavity to avoid the rod, and a normal state where it returns to the positioning groove. When the lower end of the rod slides beyond a predetermined position, the one-way latch can return to the normal state or fully return to the normal state to support the rod when the lifting and lifting assembly separates from the rod.

[0007] As a further embodiment of this utility model: a rod feeding mechanism for friction stir additive manufacturing, the feeding mechanism includes a mounting bracket, a positioning groove disposed on the mounting bracket for accommodating and radially limiting the rod, and a lifting and lifting assembly for lifting the rod to slide upward within the positioning groove; a one-way buckle is movably installed at the upper section of the positioning groove, the one-way buckle having a avoidance state when it moves to the outside of the positioning groove cavity to avoid the rod, and a normal state when it returns to the positioning groove. When the lower end of the rod slides beyond the predetermined position, the one-way buckle can return to the normal state or fully return to the normal state to lift the rod when the lifting and lifting assembly separates from the rod.

[0008] As a further improvement of this utility model, a reset spring is also provided in the mounting cavity for elastically squeezing the swing arm to maintain the normal state.

[0009] As a further improvement of this utility model: the one-way buckle is a horizontal rod that slides horizontally on the positioning groove. The inner end of the horizontal rod is driven by an elastic mechanism and slides through the positioning groove cavity under normal conditions. The lower edge of the through section of the horizontal rod has a wedge-shaped structure.

[0010] As a further embodiment of this utility model: the lifting and supporting assembly includes a first lifting assembly whose lifting part's movement path avoids the wall of the positioning groove. The lifting part of the first lifting assembly has an extension part that extends into the positioning groove to support the rod. The extension part supports the rod through an elastic member arranged along the length of the positioning groove in an elastic telescoping direction. The elastic member can descend with the lifting part to form a material release interval between itself and the lower end of the positioning groove. When the elastic member is in a compressed state, the distance of the material release interval is greater than or equal to the length of the rod. When the elastic member is in an uncompressed or slightly compressed state after supporting the rod, the distance of the material release interval is less than the length of the rod.

[0011] As a further embodiment of this utility model: a positioning groove coaxial with the groove length direction and the elastic extension direction and the elastic element constitute a set of feeding stations, and the feeding stations are set to at least two parallel distributions.

[0012] As a further embodiment of this utility model: the elastic element includes a support rod that slides along the length of the positioning groove on the extension, and the extension is provided with a lifting spring for driving the support rod to slide elastically.

[0013] The transfer mechanism applies the rod feeding mechanism for friction stir additive manufacturing. The transfer mechanism is located on the upper side of the mounting bracket. The transfer mechanism includes a gripping component for clamping the upper section of the rod body. The transfer mechanism also includes a multi-axis transfer component that drives the gripping component to move upward to pull the rod out of the positioning groove and move it to the feed port of the friction stir additive manufacturing spindle.

[0014] The pressing mechanism utilizes the aforementioned rod feeding mechanism for friction stir additive manufacturing. This pressing mechanism is located beside the main shaft inlet of the friction stir additive manufacturing device. The pressing mechanism includes a pressing shaft coaxially distributed above the main shaft inlet. The upper end of the pressing shaft is connected to the lifting part of the second lifting assembly. When the lifting part of the second lifting assembly drives the pressing shaft upwards, a clearance space is formed between the lower end of the pressing shaft and the main shaft inlet of the friction stir additive manufacturing device, allowing the rod to enter the main shaft inlet. When the lifting part of the second lifting assembly drives the pressing shaft downwards, the lower end of the pressing shaft is pressed tightly against the upper end of the rod.

[0015] As a further embodiment of this utility model: the lower end of the pressure shaft is a rotating sleeve that is coaxially rotated on the pressure shaft via a bearing; or the pressure shaft is rotated on the lifting part of the second lifting assembly via a bearing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. When the bar is lifted to a high position by the lifting and supporting assembly, the one-way latch moves outward to form a clearance state to avoid the bar; after the lower end of the bar slides to the predetermined position above the one-way latch, ensure that the one-way latch can be reset to the normal state or fully reset to the normal state, so as to lift the bar when the lifting and supporting assembly separates from the bar. The one-way latch takes over the lifting and supporting assembly to lift the bar, so that the bar can be lifted to the designated position that can be transferred by the transfer mechanism without the support of the lifting and supporting assembly.

[0018] Therefore, during the time between the bar stock waiting for transfer by the transfer mechanism and the next transfer interval, the lifting and jacking assembly can descend to reload, so as to transport the bar stock back to the designated position that can be transferred by the transfer mechanism as early as possible before the next transfer of the bar stock after it has been transferred by the transfer mechanism. Thus, this application not only eliminates the need for the lifting and jacking assembly to continuously lift the bar stock, but also effectively shortens the time interval between feeding the bar stock again after it has been transferred by the transfer mechanism.

[0019] 2. The one-way latch is provided in the following two implementations: The one-way latch is a swing arm that swings about a horizontal axis, and the side of the cantilever end of the swing arm adjacent to the positioning groove cavity has a protrusion that is normally located within the positioning groove cavity, and the lower edge of the protrusion has a wedge-shaped structure. Alternatively, the one-way latch is a horizontal rod that slides horizontally on the positioning groove, and the inner end of the horizontal rod is driven by an elastic mechanism and slides through into the positioning groove cavity in normal conditions, with the lower edge of the through section of the horizontal rod having a wedge-shaped structure.

[0020] In both of the above embodiments, during the feeding process, when the lifting and supporting assembly drives the rod to slide upward to the lower edge of the one-way latch, the upper end of the rod can engage with the wedge surface of the lower edge of the protruding part of the swing arm or the wedge surface of the lower edge of the through section of the horizontal bar, thereby allowing the protruding part or through section to avoid the movement path of the rod; at the same time, the swing arm and the horizontal bar can be reset to their normal state under their own gravity or elastic force. Therefore, the one-way latch in this application does not require an external power source, making the structure of the one-way latch simpler.

[0021] 3. The transfer mechanism clamps the upper section of the bar with the gripping component and drives the gripping component to move upward through the multi-axis transfer component to pull the bar out of the positioning slot and transfer it to the main shaft feed port of the friction stir additive manufacturing device. During the transfer process, the feeding component only needs to lift the bar and support it stably. The feeding component does not need to perform any additional movement.

[0022] 4. A clamping mechanism is provided to clamp the bars within the guide mechanism, ensuring that adjacent ends of adjacent bars abut against each other. Simultaneously, the lower end of the pressure shaft is a rotating sleeve coaxially mounted on the pressure shaft via a bearing, or the pressure shaft is mounted on the lifting part of the second lifting assembly via a bearing. This reduces the frictional resistance between the pressure shaft and the bars during the rotation of the main shaft. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the feeding mechanism and the transfer mechanism in this utility model.

[0024] Figure 2 This is a partial structural diagram of the feeding mechanism in this utility model.

[0025] Figure 3 This is a schematic diagram of the installation structure of the one-way buckle in this utility model.

[0026] Figure 4 This is a schematic diagram of the material pressing mechanism in this utility model.

[0027] Figure 5 This is a cross-sectional view of the guide mechanism in the overall assembly structure of this utility model.

[0028] Figure 6 This is a top view of the guide mechanism in the overall assembly structure of this utility model.

[0029] Figure 7 This is a schematic diagram of the conveying mechanism of the helical gear transmission in the overall assembly structure of this utility model.

[0030] Figure 8 This is a schematic diagram of the first distribution structure of the active helical teeth and the driven helical teeth in the overall assembly structure of this utility model.

[0031] Figure 9 This is a schematic diagram of the conveying mechanism of the worm gear transmission in the overall assembly structure of this utility model.

[0032] Figure 10 This is a schematic diagram of the distribution of the drive wheel and driven wheel in the assembly structure of this utility model, according to Embodiment 1.

[0033] Figure 11 This is a schematic diagram of the second distribution structure of the active helical teeth and the driven helical teeth in the overall assembly structure of this utility model.

[0034] Figure 12 This is a schematic diagram of Embodiment 2, showing the distribution of the drive wheel and driven wheel in the overall assembly structure of this utility model.

[0035] In the diagram: 10. Feeding mechanism; 11. Mounting bracket; 12. Positioning groove; 121. Mounting cavity; 122. Discharge interval; 13. Lifting and supporting assembly; 131. First lifting assembly; 132. Lifting spring; 133. Support rod; 14. One-way buckle; 141. Swing rod; 1411. Protrusion; 142. Return spring; 20. Transfer mechanism; 21. Gripping assembly; 22. Multi-axis transfer assembly; 30. Pressing mechanism; 31. Second lifting assembly; 32. Pressing shaft; 33. Rotation. Set; 40. Guide mechanism; 41. Round tube guide section; 411. Slag discharge hole; 42. Chamfered transition section; 43. Flared guide section; 44. Steering convex head; 45. Regular polygonal tube butt section; 50. Conveying mechanism; 51. Mounting base; 52. Power wheel; 53. Driven wheel; 541. Shaft; 542. First gear; 543. Idler wheel; 5431. Through hole; 544. Driving helical gear; 545. Driven helical gear; 546. Worm gear; 547. Worm; 55. Guide rod tube; a. Bar material. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] For ease of understanding, the specific structure and working method of this utility model are further described below with reference to the accompanying drawings:

[0038] The transfer mechanism 20, pressing mechanism 30, and feeding mechanism 10 of this utility model are part of the bar transfer system for friction stirring additive manufacturing. The specific structure of their assembly is described in reference [reference needed]. Figure 1-12 As shown, it mainly includes a conveying mechanism 50, a guiding mechanism 40, a transfer mechanism 20, a pressing mechanism 30, and a feeding mechanism 10.

[0039] The functions and cooperation between the various mechanisms are roughly as follows: the feeding mechanism 10 continuously supplies rods a to the transfer mechanism 20, which then transfers multiple rods a sequentially and places them into the guide pipe of the guiding mechanism 40; after the rods a are guided through the guide pipe, the pressing mechanism 30 presses the uppermost rod a, so that the adjacent ends of the multiple rods a are arranged close together, thereby realizing the continuous and accurate docking and conveying of multiple rods a to the guide tube 55 of the continuous conveying mechanism 50, and then the continuous conveying mechanism 50 continuously conveys the rods a to the head of the main shaft of the friction stirring additive manufacturing device for solid-state composite (additive deposition) manufacturing.

[0040] 1. Material supply mechanism 10

[0041] like Figure 1-3 As shown, the feeding mechanism 10 includes a mounting bracket 11, a positioning groove 12 disposed on the mounting bracket 11 for accommodating and radially limiting the bar a, and a lifting and supporting assembly 13 for lifting the bar a to slide upward within the positioning groove 12. Preferably, the positioning groove 12 is arranged vertically along its length. In use, the bar a is placed in the positioning groove 12, and the lifting and supporting assembly 13 is used to lift it upward, thereby lifting the bar a to a high position so that the transfer mechanism 20 can perform transfer operations.

[0042] To improve the efficiency of the above-mentioned material supply operations, such as Figure 1-3 As shown, a one-way latch 14 is movably installed in the upper section of the positioning groove 12. Figure 3As shown, the one-way buckle 14 has a avoidance state when it moves to the outside of the positioning groove 12 to avoid the rod a, and a normal state when it is reset to the positioning groove 12. When rod a is lifted to a high position by the lifting and supporting assembly 13, the one-way latch 14 moves outward to form a clearance state to avoid rod a. After the lower end of rod a slides to a predetermined position above the one-way latch 14, it is ensured that the one-way latch 14 can be reset to its normal state (there is a certain intersection between the lifting path of the lifting and supporting assembly 13 and the reset path of the one-way latch 14, so that the one-way latch 14 can only be partially reset) or fully reset to its normal state (there is no intersection between the lifting path of the lifting and supporting assembly 13 and the reset path of the one-way latch 14, so that the one-way latch 14 can be fully reset). This allows the lifting and supporting assembly 13 to lift rod a when it separates from rod a, and the one-way latch 14 to take over the lifting and supporting assembly 13 in lifting rod a, so that rod a can be lifted to a designated position that can be transferred by the transfer mechanism 20 without the support of the lifting and supporting assembly 13. Therefore, during the time between the waiting for the transfer mechanism 20 to transfer the bar a and the next transfer interval after the transfer, the lifting and supporting assembly 13 can be lowered to load the bar a again. This allows the bar a to be transported to the designated position that the transfer mechanism 20 can transfer as soon as possible after the bar a in the transfer position has been transferred. (Since the transfer mechanism 20 needs to grab the bar a during transfer, the upper end of the bar a must protrude above the positioning groove 12. Of course, to reduce the lifting stroke of the transfer mechanism 20, the height of the bar a is preferably as high as possible while maintaining stability within the positioning groove 12.) Thus, this application not only eliminates the need for the lifting and supporting assembly 13 to continuously lift the bar, but also effectively shortens the time interval between the re-feeding of the bar a on the feeding mechanism 10 after the transfer mechanism 20 has transferred it.

[0043] The predetermined position where the lower end of the aforementioned rod a slides to above the one-way latch 14 is such that the rod a does not obstruct the one-way latch 14 from returning to its normal position.

[0044] If the one-way latch 14 is fully reset, the lowest predetermined position is above the highest point of the reset path of the one-way latch 14. Therefore, when the lifting and supporting assembly 13 separates from the rod a, the rod a can be supported by the one-way latch 14 that has been reset to its normal state.

[0045] If the one-way latch 14 is a partial reset, depending on the magnitude of the reset force of the one-way latch 14 and the structure of the one-way latch 14, the given position can be set in multiple ways:

[0046] If the one-way latch 14 has sufficient reset force, and in the structure of the one-way latch 14, the one-way latch 14 is a horizontal reset path or the reset path can generate an upward driving force on the rod a (such as the one-way latch 14 swinging to reset from bottom to top), the predetermined position is the position when the one-way latch 14 partially resets and abuts against the lower end of the rod a. When the lifting and supporting assembly 13 separates from the rod a, the one-way latch 14 with partial reset can be used to lift the rod a, and its reset force can be used to reset the one-way latch 14 to the normal state. At the same time, when the reset path of the one-way latch 14 can generate an upward driving force on the rod a, the upward driving force generated by the reset can be used to make the rod a position that can be transferred by the transfer mechanism 20.

[0047] If the resetting force of the one-way latch 14 is insufficient, and / or in the structure of the one-way latch 14, the rod a will block the one-way latch 14 from switching from partial reset to full reset (e.g., the one-way latch 14 swings down to reset), the predetermined position must be at least above the one-way latch 14 and there must be a gap between it and the one-way latch 14; at this time, the descent speed of the lifting and supporting assembly 13 needs to be greater than the descent speed of the rod a. Using this speed difference, the lifting and supporting assembly 13 can avoid the reset path of the one-way latch 14, and after the one-way latch 14 is fully reset to its normal state, the rod a can be located at the one-way latch 14.

[0048] Specifically, the specific implementation methods of the one-way latch 14 include:

[0049] Example 1, as Figure 3 As shown, the one-way latch 14 is a swing rod 141 that swings about a horizontal axis. In its normal state, the cantilever end of the swing rod 141 is vertically downward, and one side of the cantilever end of the swing rod 141 adjacent to the positioning groove 12 cavity has a protrusion 1411 that is normally located within the positioning groove 12 cavity. The lower edge of the protrusion 1411 has a wedge-shaped structure. An installation cavity 121 is arranged on the upper section of the positioning groove 12. The installation cavity 121 is used to install the swing rod 141 and accommodate the swing rod 141 and the protrusion 1411 in the avoidance state. During the feeding process, when the lifting and supporting assembly 13 drives the rod a to slide upward until it contacts the lower edge wedge surface of the protrusion 1411, the wedge engagement between the upper end of the rod a and the lower edge wedge surface of the protrusion 1411 allows the swing rod 141 to swing outward, thereby causing the protrusion 1411 to avoid contact with the movement path of the rod a. Meanwhile, the vertically downward arrangement of the cantilever end of the swing arm 141 in its normal state allows it to automatically swing from the avoidance state to the normal state under its own gravity. Therefore, the one-way latch 14 in this application does not require an external power source, making its structure simpler.

[0050] Of course, in order to further improve the reset effect of the swing arm 141 to return to the normal state, a reset spring 142 is also provided in the mounting cavity 121 for elastically squeezing the swing arm 141 to keep it in the normal state, so as to ensure the support effect of the swing arm 141 on the rod a in the normal state.

[0051] In Example 2, the one-way latch 14 is a horizontal rod that slides horizontally on the positioning groove 12. The inner end of the horizontal rod is driven by an elastic mechanism and slides through the cavity of the positioning groove 12 under normal conditions. The elastic mechanism can be a spring or a sheet spring, etc. The lower edge of the through section of the horizontal rod has a wedge-shaped structure, similar to Example 1. The horizontal rod can be automatically driven to slide outwards by the wedge-shaped engagement of the rod a and the wedge, and automatically reset to its normal state using the elastic mechanism. No power source is required, ensuring the simplicity of the one-way latch 14 structure. By using a horizontal rod structure, during the lifting process of the rod a, the horizontal rod is difficult to move towards an avoidance state due to the action of the rod a, thus maintaining good stability during the lifting process.

[0052] Based on the above, such as Figure 1 and Figure 2 As shown, the lifting and supporting assembly 13 includes a first lifting assembly 131 whose lifting movement path avoids the wall of the positioning groove 12. The lifting part of the first lifting assembly 131 has an extension that extends into the positioning groove 12 to support the rod a. The extension supports the rod a through an elastic member arranged along the length of the positioning groove 12 in an elastic telescoping direction. The elastic member can descend with the lifting part to form a feeding interval 122 between itself and the lower end of the positioning groove 12. When the elastic member is pressed down by hand, foot, or the lower end of the rod a, causing it to be in a compressed state, the distance of the feeding interval 122 is greater than or equal to the length of the rod a. At this time, the rod a can be placed between the elastic member and the lower end of the positioning groove 12. Afterward, when the elastic member is in an uncompressed or slightly compressed state after supporting the rod a, the distance of the feeding interval 122 is less than the length of the rod a, so that the upper end of the rod a can be inserted into the lower end of the positioning groove 12, thereby achieving radial positioning of the rod a. The structural arrangement of this elastic element not only allows the rod a to be easily inserted into the positioning groove 12 for radial positioning, but also utilizes the rebound of the elastic element to position the lower end of the rod a, preventing the rod a from detaching from the lower end of the positioning groove 12. This eliminates the need for the lifting unit to descend to allow the rod a to enter the predetermined space below the positioning groove 12, and also eliminates the need for the lifting unit to rise and restrict the rod a from detaching from the lower end of the positioning groove 12. The loading of the rod a is efficient and convenient. Specifically, the first lifting assembly 131 can be any mechanism capable of linear lifting motion, such as a cylinder or a lead screw slider mechanism, as is available in the prior art.

[0053] Based on the above, such as Figure 1As shown, a set of loading stations is formed by a positioning groove 12 that is coaxial with the groove length direction and the elastic extension direction and an elastic element. Under the above-mentioned efficient and convenient bar a loading method, the loading stations are set to at least two horizontally distributed to realize multi-station loading and reduce the frequency of reciprocating motion of the lifting and hoisting assembly 13.

[0054] like Figure 2 As shown, the elastic element includes a support rod 133 that slides along the length of the positioning groove 12 on the extension. The extension is provided with a lifting spring 132 that drives the support rod 133 to slide elastically upward. In actual implementation, the elastic element can be just a sheet or a spring, or it can be a telescopic rod combined with a spring, as long as it can achieve downward pressing and elastic return after pressing.

[0055] 2. Transfer organization 20

[0056] like Figure 1 As shown, the transfer mechanism 20 is located on the upper side of the mounting bracket 11. The transfer mechanism 20 includes a gripping component 21 for clamping the upper outer rod body protruding into the positioning groove 12 on the rod a. Specifically, the gripping component 21 is a clamping structure commonly used in the prior art, such as cylinder clamping or screw-slider mechanism driven clamping. The transfer mechanism 20 also includes a multi-axis transfer component 22 that drives the gripping component 21 to move upward to pull the rod a out of the positioning groove 12 and move it to the feed port of the main shaft of the friction stir additive manufacturing device. The multi-axis transfer component 22 is also a multi-axis manipulator structure commonly used in the prior art, with a lifting module that drives the gripping component 21 to move up and down, such as a screw-slider or cylinder that moves along the Z-axis, and a moving module that swings or slides horizontally to align the rod a with the feed port, such as a motor-driven swing arm and a screw-slider or cylinder that moves along the X and Y axes.

[0057] In use, the gripping component 21 is first moved to the bar a by the multi-axis transfer component 22, and the bar a is clamped by the gripping component 21. Then, the multi-axis transfer component 22 drives the gripping component 21 and the bar a to rise, so that the bar a separates from the positioning groove 12. Finally, the multi-axis transfer component 22 drives the gripping component 21 and the bar a to swing horizontally and / or move, so that the bar a is aligned with the feed port, and the gripping component 21 is released so that the bar a falls into the feed port.

[0058] 3. A pressing mechanism 30, located beside the feed inlet of the main shaft of the friction stir additive manufacturing device. For example... Figure 4As shown, the pressing mechanism 30 includes a pressing shaft 32 coaxially distributed above the main shaft inlet of the friction stir additive manufacturing device. The upper end of the pressing shaft 32 is connected to the lifting part of the second lifting assembly 31. When the lifting part of the second lifting assembly 31 drives the pressing shaft 32 to move upward, a clearance space is formed between the lower end of the pressing shaft 32 and the main shaft inlet of the friction stir additive manufacturing device, allowing the rod a to enter the main shaft inlet of the friction stir additive manufacturing device, so that the rod a can be transferred and placed into the inlet by the transfer mechanism 20. When the lifting part of the second lifting assembly 31 drives the pressing shaft 32 to move downward, the lower end of the pressing shaft 32 is pressed tightly against the upper end of the rod a, so that the rod a entering the inlet is pressed tightly, ensuring that the ends of adjacent rods a are stably attached. Specifically, the second lifting assembly 31 can be any mechanism that can realize linear lifting motion, such as a cylinder or a lead screw slider mechanism in the prior art.

[0059] Based on the above, such as Figure 4 As shown, the lower end of the pressure shaft 32 is a rotating sleeve 33 that is coaxially rotated on the pressure shaft 32 via a bearing; or the pressure shaft 32 is rotated on the lifting part of the second lifting assembly 31 via a bearing, so that the frictional resistance between the pressure shaft 32 and the bar a is reduced during the rotation of the main shaft, so that the rotating sleeve 33 or the pressure shaft 32 can rotate with the bar a.

[0060] It is worth mentioning that when the bar a needs initial power to enter the subsequent conveying mechanism 50, the pressure shaft 32 of this application can also serve as the initial power source for the bar a to stably enter the conveying mechanism 50. The pressure shaft 32 is moved downward to the limit position by the second lifting component 31, thereby positioning and conveying the bar a to the stable transmission area of ​​the conveying mechanism 50. At the same time, by detecting whether the pressure shaft 32 has reached the limit position, it can be indirectly determined whether the bar a has been accurately positioned in the stable transmission area of ​​the conveying mechanism 50, thus realizing the dual functions of auxiliary positioning and status monitoring.

[0061] 4. Guiding mechanism 40

[0062] like Figure 5 As shown, the guiding mechanism 40 includes a guiding pipe composed of a circular tube guiding section 41, a chamfered transition section 42, and a regular polygonal tube connecting section 45 arranged coaxially from top to bottom. Figure 6 As shown, when the cross-section of bar a is a regular polygonal structure, from the axial perspective of bar a, the case where the misalignment angle between bar a and the regular polygonal tube connecting section 45 is the largest is when the outer corner of bar a is located on the vertical line of the corresponding midpoint of the side wall of the regular polygonal tube connecting section 45. In this state, during the process of bar a being transported from the round tube guide section 41 to the regular polygonal tube connecting section 45, the angle that needs to be adjusted is the largest at the chamfered transition section 42, which makes it most likely that bar a will be stuck in the chamfered transition section 42.

[0063] In this application, a steering protrusion 44 extending into the inner cavity of the circular tube guide section 41 is fixed at the lower part, and the extended end of the steering protrusion 44 has a hemispherical structure. Figure 6 As shown, from the axial perspective of the circular tube guide section 41, the steering protrusion 44 is located outside the projection of the regular polygonal tube docking section 45, and the steering protrusion 44 is located on the radial straight line of the circular tube guide section 41. Therefore, the radial straight line must pass through the center of the circular tube guide section 41 (i.e., the center of the regular polygonal tube docking section 45), and the radial straight line is perpendicular to the side of the regular polygonal tube docking section 45 adjacent to the steering protrusion 44. That is, the radial straight line satisfies that it is perpendicular to the side of the regular polygonal tube docking section 45 and passes through the midpoint of the side.

[0064] When the rod a and the polygonal tube section 45 are at or near the maximum misalignment angle, the rod a will collide with the steering protrusion 44 before entering the chamfered transition section 42. Due to the hemispherical structure of the extended end of the steering protrusion 44, the rod a can form a wedge fit with the hemispherical inclined surface. The continuous rotation of the main shaft of the friction stirring additive manufacturing device keeps the guide pipe in a rotating state. Even if the rod a contacts the uppermost end of the inclined surface of the steering protrusion 44, the interaction force between the two will cause the rod a to deflect, avoiding jamming. This wedge fit causes the rod a to adjust its axial angle relative to the polygonal tube section 45, reducing the misalignment angle. The adjusted rod a can enter the chamfered transition section 42 with a smaller misalignment angle, ensuring that the chamfered transition section 42 can effectively correct the deviation, allowing the rod a to smoothly enter the inner cavity of the polygonal tube section 45, effectively avoiding the jamming problem in the traditional rod a guiding and conveying process.

[0065] Based on the above, the steering protrusion 44 extends along a radial straight line, resulting in symmetrical arrangement on both sides of the radial line. This ensures that the probability of the bar a being guided by both sides of the steering protrusion 44 is essentially the same, preventing reduced service life of the steering protrusion 44 due to uneven wear on one side. Furthermore, the extension depth of the steering protrusion 44 is adjustable. Specifically, the steering protrusion 44 can be installed by sliding along the extension direction and locked with a pin, as is common in existing technologies, or it can be threaded into the guide section 41 of the round tube. The key is to adjust the insertion depth of the steering protrusion 44. This depth adjustment facilitates adjustment during installation, ensuring the steering protrusion 44 is at a suitable extension depth.

[0066] Based on the above, the inner cavity of the chamfered transition section 42 is formed by chamfers that match the inner edge of each inner end of the upper part of the regular polygonal tube mating section 45. Using chamfers, compared to the rounded chamfers of the frustum-shaped inner cavity, and given that the aforementioned turning protrusion 44 allows the rod a to enter the chamfered transition section 42 with a smaller misalignment angle, it is easier to align the outer periphery of the rod a with the inner cavity profile of the regular polygonal tube mating section 45, allowing the rod a to smoothly enter the inner cavity of the regular polygonal tube mating section 45.

[0067] Based on the above, such as Figure 5 As shown, a flared guide section 43 is coaxially fixed to the upper end of the circular tube guide section 41. The cavity inside the flared guide section 43, which communicates with the upper end of the circular tube guide section 41, is a frustum-shaped cavity that is wider at the top and narrower at the bottom. The lower diameter of the frustum-shaped cavity is the same as the cross-sectional diameter of the circular tube guide section 41. The design of the flared guide section 43 allows the rod a to be guided to the circular tube guide section 41 even when the diameter of the circular tube guide section 41 is slightly larger than or equal to the radius of the circle formed by the outer edge corners of the rod a. This reduces the transfer accuracy requirements of the transfer mechanism 20 and ensures that the rod a remains as vertical as possible within the cavity of the circular tube guide section 41.

[0068] Based on the above, such as Figure 5 As shown, a slag discharge hole 411 is provided on the outer circumference of the guide pipe, and the slag discharge hole 411 is located below the steering protrusion 44; further, the slag discharge hole 411 is configured as at least two evenly distributed around the outer circumference of the guide pipe; even further, at least two slag discharge holes 411 evenly distributed around the outer circumference of the guide pipe constitute a slag discharge unit, and this slag discharge unit is configured as at least two sets spaced apart along the length of the guide pipe. This is used to discharge as much of the friction debris generated between the rod a and the inner wall of the guide pipe as possible.

[0069] 5. Conveying mechanism 50

[0070] like Figure 7-12As shown, the conveying mechanism 50 includes a mounting base 51 and a guide tube 55 on the mounting base 51 for guiding the conveying of bar a. In actual implementation, the upper end of the guide tube 55 is connected to the lower end of the regular polygonal tube joint section 45 in the aforementioned guide pipe, so that the bar a guided by the regular polygonal tube joint section 45 is accurately conveyed into the guide tube 55. A guide notch is provided on the side of the guide tube 55. A drive wheel 52 and a driven wheel 53 with horizontal axes and wheel surfaces extending into the guide notch and abutting against the bar a are rotatably fitted on the mounting base 51. A conveying unit is formed by a drive wheel 52 and a driven wheel 53 symmetrically distributed on both sides of the guide tube 55. As the name suggests, the drive wheel 52 is driven by external power, while the driven wheel 53 only plays an auxiliary support role, so that the bar a can be stably rolled and conveyed under the clamping of the two. This conveying method applies a uniform driving force through the continuous rotation of the drive wheel 52, making the movement of the bar a more stable, and the control logic is simple, only requiring the rotation of the drive wheel 52 to be maintained. Furthermore, this application utilizes a guide notch on the side of bar a and extends the wheel surfaces of the drive wheel 52 and driven wheel 53 to the guide notch to guide bar a. This eliminates the need for multiple guide tubes 55, meaning that the entire centering process of bar a can be achieved using an integrated guide tube 55.

[0071] Based on the above, the arrangement of the driving wheel 52 and the driven wheel 53 in this application has the following two implementation methods:

[0072] Example 1, as Figure 10 As shown, the conveying unit is configured as at least two sets arranged at intervals along the length of the guide tube 55, and the power wheels 52 of adjacent conveying units are alternately arranged on both sides of the guide tube 55.

[0073] In this layout, the alternating arrangement of the power wheels 52 reduces interference between the power sources of adjacent power wheels 52 when the adjacent conveying units are densely arranged along the length of the guide tube 55. This rational layout allows for a more compact arrangement of the power units of the power wheels 52, maximizing the number of conveying units and thus achieving stable conveying of the bar a. Simultaneously, the multiple sets of conveying units form a progressive drive, ensuring continuous conveying even if one set of power wheels 52 temporarily fails, improving system reliability. Furthermore, the alternating arrangement of the power wheels 52 creates a relatively symmetrical frictional thrust on both sides, preventing skew caused by unilateral force application and ensuring smooth axial conveying of the bar a.

[0074] This design achieves a high-density, low-interference arrangement of conveying units within a limited space through the alternating layout of the power wheels 52 of adjacent conveying units. At the same time, it optimizes the force distribution of the bar a, taking into account both structural compactness and conveying stability. It is suitable for high-precision, long-distance bar conveying scenarios.

[0075] In Embodiment 1 of the above-described arrangement of the driving wheel 52 and the driven wheel 53, as follows: Figure 8 As shown, the power components connected to the drive source on both sides of the power wheel 52 are arranged at opposite ends of the power wheel 52. This reduces interference between the power components on both sides of the power wheel 52, further optimizing the layout between adjacent power units and making them more compact. Of course, in actual implementation, the power components connected to the drive source on both sides of the power wheel 52 can also be arranged at the same end of the power wheel 52. In this layout, only one side of the power component needs to be arranged, making installation convenient. Moreover, if space permits, the layout of the power component during the driving process can be optimized. For example, in the implementation where the subsequent power component uses a worm gear 546, all the worm gears 546 can be driven to rotate through the same worm 547.

[0076] Example 2, as Figure 12 As shown, the conveying units are arranged in at least three groups at intervals along the length of the guide tube 55, and the axial direction of the power wheel 52 of the adjacent conveying units is perpendicular to that of the guide tube 55 from the axial perspective.

[0077] Firstly, the advantage of this layout for the strength of the guide tube 55 is that, from the axial perspective of any drive wheel 52, assuming that the guide notch of one conveying unit is opened on the left and right sides, the guide notches of its adjacent conveying units are opened on the front and rear sides, effectively dispersing the guide notches and avoiding the situation where the strength of that side is reduced due to the guide notches being concentrated on the left and right sides or the front and rear sides. However, compared with the layout of the drive wheel 52 and driven wheel 53 described above, that is, compared with the form where the guide notches are concentrated on the left and right sides or the front and rear sides, the difficulty of making the guide notches in this embodiment is increased.

[0078] Secondly, this layout also ensures that the power sources of the power wheels 52 of adjacent conveying units are offset at right angles around the axis of the guide rod tube 55, effectively avoiding interference between the power sources of adjacent conveying units when they are densely packed. Similarly, this reasonable layout allows for a more compact arrangement of the power units, maximizing the number of conveying units and thus achieving stable conveying of the bar a. Furthermore, the multiple sets of conveying units form a progressive drive, ensuring that even if one power wheel 52 temporarily fails, the remaining conveying units can maintain continuous conveying, improving system reliability.

[0079] like Figure 11As shown, based on Embodiment 2 of the layout of the driving wheel 52 and driven wheel 53, in adjacent conveying units with the same axial direction of the driving wheel 52, the power components connected to the power source of the driving wheel 52 are respectively arranged at opposite ends of the driving wheel 52. This reduces interference between the power components of the two driving wheels 52, further optimizing the layout between adjacent power units and making the arrangement between adjacent power units more compact. Of course, in actual implementation, the power components connected to the power source of the driving wheel 52 with the same axial direction can also be arranged at the same end of the driving wheel 52. Under this layout, only two sides of the guide tube 55 need to be arranged for the power components, which is convenient for installation. Moreover, if space permits, the layout of the power component during the driving process can be optimized. For example, in the implementation where the subsequent power component adopts a worm gear 546, all the worm gears 546 on the same side can be driven to rotate by the same worm 547.

[0080] Furthermore, such as Figure 11 and Figure 12 As shown, based on the above-described embodiment 2 with the arrangement of the driving wheel 52 and the driven wheel 53, the driving wheels 52 of adjacent conveying units with the same axial direction are alternately arranged on both sides of the guide tube 55. That is, assuming that the driving wheels 52 of the first group of conveying units and the third group of conveying units from top to bottom have the same axial direction, the driving wheels 52 of the first group of conveying units and the third group of conveying units are located on both sides of the guide tube 55.

[0081] This layout further reduces interference between the power sources of the drive wheels 52 of the first and third conveying units, allowing for a denser arrangement of adjacent conveying units. Furthermore, when the number of conveying units exceeds four, the bar a is driven by the drive wheels 52 at four equidistant angles on its outer periphery. This also avoids skewness caused by unilateral force application, ensuring smooth axial transport of the bar a. This layout further achieves high-density, low-interference conveying unit arrangement within a limited space, while optimizing the force distribution on the bar a, balancing structural compactness and conveying stability. It is suitable for high-precision, long-distance bar conveying scenarios.

[0082] Under this layout, such as Figure 11 and Figure 12 As shown, the layout of the power components on the power wheel 52 can also be as follows: in adjacent conveying units with the same axial direction of the power wheel 52, the power components connected to the power source of the power wheel 52 are respectively arranged at opposite ends of the power wheel 52, and the power components connected to the power source of the power wheel 52 with the same axial direction are all arranged at the same end of the power wheel 52. The two implementation methods can be adapted to the spatial layout requirements.

[0083] Based on the above two embodiments of the drive wheel 52 and driven wheel 53, this application provides two implementations in which the power component is a driven helical gear 545 and a worm gear 546.

[0084] like Figure 9 As shown, the power component is a worm gear 546 coaxially fixed to the end of the power wheel 52, and a worm 547, driven by a power source and meshing with the worm gear 546, is rotatably fitted on the mounting base 51. When the power source drives the worm 547 to rotate, the power drive of the power wheel 52 is achieved through the meshing of the worm 547 and the worm gear 546. This method of using the worm 547 and worm gear 546 means that when the lead angle of the worm 547 is less than the friction angle, the worm gear 546 can only be driven unidirectionally by the worm 547. When the worm 547 is not rotating, the rotation of the power wheel 52 can be locked by the worm 547.

[0085] like Figure 7 , Figure 8 and Figure 11 As shown, when the power component is a driven helical gear 545 coaxially fixed to the end of the power wheel 52, a shaft 541 driven by a power source is rotatably fitted on the mounting base 51, and a driving helical gear 544 coaxially fixed on the shaft 541 to mesh with the driven helical gear 545. The helical gear transmission method has the advantages of high transmission efficiency and low energy consumption.

[0086] In the above two implementation methods of power components, specifically, as follows: Figure 7 , Figure 8 and Figure 11 As shown, all shafts 541 are arranged along the length of the guide tube 55. All power wheels 52 located on the same end and parallel to the same shaft 541 form a synchronization unit. The number of shafts 541 corresponds to the number of synchronization units. Each shaft 541 has several coaxially fixed driving helical teeth 544 that mesh one-to-one with all driven helical teeth 545 on the corresponding synchronization unit. All shafts 541 have coaxially fixed first gears 542. A gear set that meshes with all first gears 542 is rotatably fitted on the mounting base 51, ensuring that all first gears 542 rotate synchronously at the same speed. The power source is connected to any worm gear 547 or shaft 541 for transmission. Figure 9 As shown, the worm gears 547 are distributed parallel to the guide rod tube 55. All the worm wheels 546 located on the same parallel line of the same worm gear 547 at the same end form a synchronization unit. The number of worm gears 547 corresponds to the number of synchronization units. The worm gears 547 mesh with all the worm wheels 546 on the same synchronization unit. A first gear 542 is coaxially fixed on all the worm gears 547. A gear set that meshes with all the first gears 542 is rotatably fitted on the mounting base 51 so that all the first gears 542 rotate synchronously at the same speed. The power source is connected to any worm gear 547 for transmission.

[0087] Taking the layout of the drive wheel 52 and driven wheel 53 in Embodiment 1 as an example, where "the conveying units are arranged in at least two sets at intervals along the length of the guide tube 55, and the drive wheels 52 of adjacent conveying units are alternately arranged on both sides of the guide tube 55, and the power components connected to the drive source on both sides of the drive wheels 52 are respectively arranged at opposite ends of the drive wheels 52": when the power component is a worm gear 546, there are two worms 547, which are respectively arranged at opposite ends of the drive wheels 52, and each worm 547 is meshed with all the worm gears 546 at the corresponding end; a first gear 542 is coaxially fixed on both worms 547, and a gear set that meshes with both first gears 542 is rotatably fitted on the mounting base 51 so that the two first gears 542 rotate synchronously at the same speed; the power source is connected to any worm 547 in a transmission cooperation.

[0088] This layout requires only one power source, such as a motor whose output shaft is connected to any worm gear 547 or shaft 541 (e.g., the output shaft is coaxially fixed with any worm gear 547, or can be driven by belt, chain, gear, etc.), which can drive all worm gears 546 or driven helical gears 545 to rotate synchronously, thereby causing all power wheels 52 to generate a rotational action that drives the rod a to slide downward.

[0089] Compared to multi-motor independent drive schemes, the single motor (power source) in this application avoids the speed deviation problems that may exist in multi-motor drives, ensuring that the bar a moves smoothly and evenly, reducing the risk of jamming or deflection. In addition, the single-motor structure also significantly reduces the complexity of electrical control components (such as drivers and sensors) and wiring, reducing hardware costs and maintenance difficulty; at the same time, the centralized drive of a single motor reduces the energy loss of multi-motor cooperative control, and does not require complex synchronization control algorithms, resulting in a more direct system response.

[0090] In addition, such as Figure 7-9 and Figure 11 As shown, in both of the above-mentioned power component embodiments, the gear set is provided with an idler wheel 543 arranged coaxially with the guide rod tube 55. The idler wheel 543 is provided with a through hole 5431 for the guide rod tube 55 to pass through. When cooperating with the worm 547 or the shaft 541 respectively: all the worms 547 are arranged on the side of the worm wheel 546 close to the guide rod tube 55 or away from the guide rod tube 55, so that when the two worms 547 rotate in the same direction, all the power wheels 52 perform a rotational action to drive the rod a downward; or the driving helical teeth 544 are arranged outside the driven helical teeth 545, and the driving helical teeth 544 on all the shafts 541 are arranged on the upper or lower side of the corresponding driven helical teeth 545, so that when all the shafts 541 rotate in the same direction, all the power wheels 52 perform a rotational action to drive the rod a downward.

[0091] Since the rod a has a regular polygonal structure, preferably a regular quadrilateral structure, from the axial perspective of the rod a, the power wheels 52 used to drive the rod a downward movement are essentially evenly distributed around the axis of the rod a, that is, all the worm gears 547 or all the shafts 541 are also arranged on the same circumference outside the axis of the rod a. By setting the gear set as an idler gear 543 arranged coaxially with the guide rod tube 55, all the first gears 542 corresponding to the worm gears 546 or the driven helical gears 545 can be directly engaged, such as... Figure 11 As shown, when there are a large number of worm gears 546 or shafts 541, the number of gears in the gear set can be reduced.

[0092] Based on the above, the surfaces of the driving wheel 52 and the driven wheel 53 are patterned to increase the friction between the driving wheel 52 and the driven wheel 53 and the rod a, ensuring that the driving wheel 52 and the driven wheel 53 generate sufficient downward driving force on the rod a. In actual implementation, a material with a high coefficient of friction, such as rubber or silicone, can also be used on the outer edge of the driving wheel 52 and the driven wheel 53; or the surfaces of the driving wheel 52 and / or the driven wheel 53 can be provided with a circumferentially distributed toothed structure.

[0093] Of course, those skilled in the art will recognize that the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0094] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0095] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A rod feeding mechanism for friction stir additive manufacturing, characterized in that, The feeding mechanism (10) includes a mounting bracket (11), a positioning groove (12) provided on the mounting bracket (11) for accommodating and radially limiting the bar (a), and a lifting and lifting assembly (13) for lifting the bar (a) to slide upward in the positioning groove (12); a one-way buckle (14) is movably installed at the upper section of the positioning groove (12). When the one-way buckle (14) is active, it has a avoidance state that moves to the outside of the positioning groove (12) to avoid the bar (a), and a normal state that is reset to the positioning groove (12). When the bar (a) slides to a position beyond the predetermined position at the lower end, the one-way buckle (14) can be reset to the normal state or fully reset to the normal state to lift the bar (a) when the lifting and lifting assembly (13) is separated from the bar (a).

2. The rod feeding mechanism for friction stir additive manufacturing according to claim 1, characterized in that, The one-way buckle (14) is a swing rod (141) that swings about a horizontal axis. Under normal conditions, the cantilever end of the swing rod (141) is vertically downward, and the side of the cantilever end of the swing rod (141) adjacent to the positioning groove (12) has a protrusion (1411) that is normally located in the positioning groove (12) cavity. The lower edge of the protrusion (1411) is a wedge-shaped structure. An installation cavity (121) is arranged on the upper section of the positioning groove (12). The installation cavity (121) is used to install the swing rod (141) and accommodate the swing rod (141) and the protrusion (1411) in the avoidance state.

3. The rod feeding mechanism for friction stir additive manufacturing according to claim 2, characterized in that, The mounting cavity (121) is also provided with a return spring (142) for elastically squeezing the rocker arm (141) to maintain the normal state.

4. The rod feeding mechanism for friction stir additive manufacturing according to claim 1, characterized in that, The one-way buckle (14) is a horizontal rod that slides horizontally on the positioning groove (12). The inner end of the horizontal rod is driven by an elastic mechanism and slides through the positioning groove (12) cavity under normal conditions. The lower edge of the through section of the horizontal rod is a wedge-shaped structure.

5. The rod feeding mechanism for friction stir additive manufacturing according to claim 1, characterized in that, The lifting and supporting assembly (13) includes a first lifting assembly (131) whose lifting part moves away from the wall of the positioning groove (12). The lifting part of the first lifting assembly (131) has an extension that extends into the positioning groove (12) to support the rod (a). The extension supports the rod (a) through an elastic member arranged along the length of the positioning groove (12) in an elastic telescoping direction. The elastic member can descend with the lifting part to form a feeding interval (122) between itself and the lower end of the positioning groove (12). When the elastic member is in a compressed state, the distance of the feeding interval (122) is greater than or equal to the length of the rod (a). When the elastic member is in an uncompressed or slightly compressed state after supporting the rod (a), the distance of the feeding interval (122) is less than the length of the rod (a).

6. The rod feeding mechanism for friction stir additive manufacturing according to claim 5, characterized in that, A positioning groove (12) and the elastic element are coaxial in the direction of groove length and the direction of elastic extension to form a set of loading stations, which are set to at least two parallel distributions.

7. The rod feeding mechanism for friction stir additive manufacturing according to claim 5, characterized in that, The elastic element includes a support rod (133) that slides along the length of the positioning groove (12) on the extension, and the extension is provided with a lifting spring (132) that drives the support rod (133) to slide elastically.

8. A transfer mechanism, wherein the transfer mechanism employs the rod feeding mechanism for friction stir additive manufacturing as described in any one of claims 1-7, characterized in that, The transfer mechanism (20) is located on the upper side of the mounting bracket (11). The transfer mechanism (20) includes a gripping assembly (21) for clamping the upper section of the rod (a). The transfer mechanism (20) also includes a multi-axis transfer assembly (22) that drives the gripping assembly (21) to move upward to pull the rod (a) out of the positioning groove (12) and move it to the main shaft feed port of the friction stir additive manufacturing device.

9. A pressing mechanism, wherein the pressing mechanism employs the rod feeding mechanism for friction stir additive manufacturing as described in any one of claims 1-7, characterized in that, The pressing mechanism (30) is located beside the main shaft feed port of the friction stir additive manufacturing device. The pressing mechanism (30) includes a pressing shaft (32) coaxially distributed above the main shaft feed port of the friction stir additive manufacturing device. The upper end of the pressing shaft (32) is connected to the lifting part of the second lifting assembly (31). When the lifting part of the second lifting assembly (31) drives the pressing shaft (32) to move upward, a clearance space can be formed between the lower end of the pressing shaft (32) and the main shaft feed port of the friction stir additive manufacturing device for the rod (a) to enter the main shaft feed port of the friction stir additive manufacturing device. When the lifting part of the second lifting assembly (31) drives the pressing shaft (32) to move downward, the lower end of the pressing shaft (32) is pressed and engaged with the upper end of the rod (a).

10. The pressing mechanism according to claim 9, characterized in that, The lower end of the pressure shaft (32) is a rotating sleeve (33) that is coaxially rotated on the pressure shaft (32) via a bearing; or the pressure shaft (32) is rotated on the lifting part of the second lifting assembly (31) via a bearing.

Images