Friction stir welding follow-welding material repairing device

Abstract

The invention discloses a friction stir welding along-welding material repairing device, which relates to the technical field of welding processing, and comprises a material storage bin arranged on a main shaft, the peripheral part of the material storage bin, which is positioned at a discharge port, is in a necking shape, so that the peripheral part and the discharge port jointly form a necking cylinder section, and the device further comprises a material guide pipe with a plug end and an opening end, the plug end is inserted into the discharging opening in a movable sealing mode and extends into the necking-down barrel section, and the outer edge of the plug end and the inner wall of the necking-down barrel section are in a matched abutting state so that the necking-down barrel section can be sealed. Through the arrangement of the storage bin and the material guide pipe, the storage bin and the material guide pipe jointly form a pressing discharging structure, and the pressing discharging structure can be assembled on friction stir welding equipment and located at the front end of the stirring needle, so that when the main shaft drives the stirring needle to be inserted into a gap between two workpieces and move in the welding direction, the stirring needle can be pressed to be discharged. And the pressing discharging structure can automatically fill and supplement the gap between the two workpieces, and manual filling operation in the earlier stage of welding is replaced.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, and in particular to a friction stir welding simultaneous material filling device. Background Art

[0002] Friction stir welding refers to the use of heat generated by the friction between a high-speed rotating welding tool (usually a stirring needle) and the workpiece to partially melt the material being welded. When the welding tool moves forward along the welding interface, the plasticized material flows from the front of the welding tool to the back under the action of the rotating friction of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool. Generally, the friction stir welding equipment includes a main shaft that moves up and down and a stirring needle that rotates at the bottom of the main shaft. This state can be controlled by Figure 1 In the figure, 101 represents the main shaft, 102 represents the stirring needle. In the working state, while the stirring needle rotates at a high speed, the stirring needle will also be driven downward by the main shaft until it acts on the workpiece, and then the main shaft will drive the continuously rotating stirring needle to move along the welding direction until the welding work is completed.

[0003] When friction stir welding is used for butt welding, that is, when two workpieces are welded, a large gap is often generated due to the poor fit between the workpieces. When the gap is too large, problems such as loose and loose welds may occur, and even the weld may not be formed.

[0004] Based on the problems arising in the above-mentioned welding process, the commonly used solution is to pour aluminum powder or fill aluminum wire into the gap between the two workpieces. However, in this method, the gap filling work needs to be performed manually. In the large-scale batch welding processing mode, this method is time-consuming and labor-intensive, which will reduce the efficiency of the welding process; and the tooling used to carry the two workpieces is surrounded by components such as detection tooling and welding robots. When performing manual filling, the staff's filling action needs to avoid such components, which will limit the staff's operation, prolong the filling time, and make the preliminary preparation work of the welding work take a long time, further reducing the welding process efficiency.

[0005] Based on this, we propose a friction stir welding simultaneous welding filling device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to propose a stir friction welding simultaneous welding material filling device, which connects a material guide pipe with a material storage bin through the downward movement of a stirring needle, so that the powder in the material storage bin can be automatically filled into the gap between the two workpieces. When the stirring needle moves along the welding direction, the material guide pipe is continuously opened for filling operation. When the welding is completed and the stirring needle moves up to reset, the material guide pipe and the material storage bin will be blocked again.

[0007] To solve the above problems, the present invention provides the following technical solutions:

[0008] A friction stir welding and simultaneous material repair device comprises a storage bin arranged on a main shaft, and the outer portion of the storage bin located at a discharge port is in a shrinking shape, so that the outer portion and the discharge port together constitute a shrinking barrel section, the device also comprises a material guide tube having a plug end and an open end, the plug end is dynamically sealed and plugged into the discharge port and extends into the shrinking barrel section, and the outer edge of the plug end is in a fit and contact state with the inner wall of the shrinking barrel section, so that the shrinking barrel section is sealed, a through hole for connecting the shrinking barrel section with the material guide tube is provided on the plug end, the open end extends toward the stirring needle and is opposite to the stirring needle position, so that when the open end moves downward with the main shaft to contact with the workpiece and produces a vertical displacement with the main shaft, the outer edge of the plug end is driven to move toward the large diameter end of the shrinking barrel section to open the shrinking barrel section.

[0009] As a further solution of the present invention: the device also includes an elastic member connected to the storage bin and the material guide pipe, and the elastic member is used to make the plug end of the material guide pipe have a movement tendency to move toward the open end.

[0010] As a further solution of the present invention: a shielding member is provided on the plug end, and the shielding member is used to shield the through hole.

[0011] As a further solution of the present invention: the shielding member includes a pin shaft threadedly installed on the plug end, one end of the pin shaft extends into the material guide tube, and this end of the pin shaft can move to the through hole and shield the through hole, so that when the pin shaft makes a rotational movement, the shielding area of ​​the through hole by this end of the pin shaft becomes larger or smaller.

[0012] As a further solution of the present invention: the elastic member is a reset spring, a first boss is provided at the discharge port, a second boss is provided on the material guide tube, the reset spring is sleeved on the material guide tube, and the two ends of the reset spring are fixedly connected to the first boss and the second boss respectively.

[0013] As a further solution of the present invention: the material guide pipe is composed of a first pipe section and a second pipe section which are detachably connected, and the second pipe section is bent as a whole so that the open end of the second pipe section faces the stirring needle.

[0014] As a further solution of the present invention: the first pipe segment is arranged at the discharge port, and an external thread is provided at its bottom end, one end of the second pipe segment is arranged in a trumpet shape for sleeved on the bottom end of the first pipe segment, and a nut is sleeved on the second pipe segment, so that when the second pipe segment is sleeved on the end of the first pipe segment, the nut can cooperate with the external thread to lock the first pipe segment and the second pipe segment.

[0015] As a further solution of the present invention: a straight barrel section is provided at the discharge port of the storage bin, and the straight barrel section is arranged coaxially and diametrically with the discharge port, so that when the outer edge of the plug end is in a fit and contact state with the inner wall of the shrinking barrel section, the through hole is located in the straight barrel section.

[0016] As a further solution of the present invention: the first boss is arranged at the discharge port through a straight tube segment.

[0017] As a further solution of the present invention: the material guide tube is made of hard material.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Through the arrangement of the material storage bin and the material guide pipe, the material storage bin and the material guide pipe together form a pressing discharge structure, which can be assembled on the friction stir welding equipment and located at the front end of the stirring needle, so that when the main shaft drives the stirring needle to insert into the gap between the two workpieces and move along the welding direction, the pressing discharge structure can automatically fill the gap between the two workpieces with material, replacing the manual filling operation in the early stage of welding. It is easy to use and can be applied to large-scale batch welding work;

[0020] 2. After the pressing and discharging structure is placed on the friction stir welding equipment, the material cavity in the pressing and discharging structure is at the upper position and the discharging port is at the lower position. The layout of this discharging structure can be well adapted to the working conditions of the friction stir welding equipment. Specifically, when the main shaft drives the stirring needle to perform a downward piercing action, the open end of the material guide tube will contact the surface of the workpiece and be affected by the upward resistance of the workpiece, so that relative movement occurs between the material guide tube and the storage bin, and then the powder in the storage bin will be transported to the open end through the necking barrel section and the through hole in turn, completing the filling work.

[0021] 3. In the present invention, when the main shaft drives the stirring needle to be inserted into the gap between the two workpieces and moves along the welding direction, the guide tube will continue to be subjected to the upward resistance of the workpiece, thereby causing the necking barrel section to be continuously opened, that is, the open end can continuously transport powder to the gap until the welding is completed. When the main shaft drives the stirring needle to move upward and reset, the guide tube moves downward and resets to seal the necking barrel section, and the open end no longer discharges material. Compared with the conventional pressing and discharging structure in the prior art, which can only discharge material continuously by repeatedly pressing back and forth, the continuous discharging method of the present invention is different from it. It only needs the upward resistance exerted by the workpiece on the guide tube to maintain sustainable discharging, and the discharging is uniform and the discharging effect is good.

[0022] 4. Furthermore, the pressing discharge structure is installed on the friction stir welding equipment and is located at the front end of the stirring needle. The continuous vibration generated by the main shaft and the stirring needle during operation can be transmitted to the storage bin. When the necking barrel section is opened, the powder in the storage bin will be vibrated and transported to the necking barrel section more evenly, without the risk of blockage.

[0023] 5. Through the setting of the elastic member, the elastic member is used to make the plug end of the material guide tube have a movement tendency to move toward the open end, and the elastic member is used to exert a vertical downward force on the material guide tube. After the welding is completed, when the main shaft drives the stirring needle to move up and reset, the elastic force exerted by the elastic member on the material guide tube cooperates with the gravity of the material guide tube to jointly act on the material guide tube, so that the material guide tube can move downward quickly to block the necking barrel section, block the discharge of the open end, and block quickly and react sensitively;

[0024] 6. By setting the shielding member, on the basis of the through hole connecting the necking barrel section with the material guide tube, the pin shaft on the shielding member can be used to change the size of the through area of ​​the through hole, and then after the through area of ​​the through hole is adjusted to be smaller, when the necking barrel section is in an open state, the powder flowing into the material guide tube through the through area of ​​the through hole per unit time will be reduced; the present invention can adaptively adjust the size of the through area of ​​the through hole according to the size of the gap generated during welding of different workpieces and the working state of the stir friction welding equipment, so as to avoid the waste caused by excessive powder delivery or the situation that insufficient powder delivery affects the welding forming effect;

[0025] 7. The material guide tube is configured to be composed of a first tube section and a second tube section that are detachably connected, and the second tube section is configured as a whole to be in a bent state. The bent state configuration can, on the one hand, allow the open end of the installed second tube section to face the stirring needle, and on the other hand, avoid the main shaft and the stirring needle, so as to better adapt to the operation of the friction stir welding equipment; and this detachable design can also quickly replace the second tube section that is more quickly worn, without the need to replace the entire material guide tube, thereby reducing maintenance costs;

[0026] 8. Through the arrangement of the straight barrel section, when the outer edge of the plug end fits and contacts the inner wall of the tapered barrel section, the through hole will be in the straight barrel section that is coaxial and has the same diameter as the material guide tube. That is, in this state, not only can the outer edge of the plug end and the inner wall of the tapered barrel section be used to cooperate to achieve the initial sealing of the through hole, but the straight barrel section with a smaller gap between the plug end and the material guide tube can also be used to perform secondary sealing of the through hole. In summary, with the joint use of the two sealing effects, the material guide tube and the storage bin can have good isolation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1It is a schematic diagram of the main shaft and stirring needle in the prior art;

[0029] Figure 2 It is a schematic diagram of the structure of the present invention installed on a friction stir welding device;

[0030] Figure 3 This is a schematic diagram of the front view structure of the material guide pipe and the material storage bin in the present invention. Figure 1 ;

[0031] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 5 This is a schematic diagram of the front view structure of the material guide pipe and the material storage bin in the present invention. Figure 2 ;

[0033] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0034] Figure 7 It is a schematic diagram of the three-dimensional split structure of the material guide tube in the present invention;

[0035] Figure 8 It is a schematic diagram of the cross-sectional structure of the storage bin in the present invention.

[0036] In the figure: 101, main shaft; 102, stirring needle;

[0037] 1. Storage bin; 2. Discharge port; 3. Narrow barrel section; 4. Material guide pipe; 401. Plug end; 402. Open end; 403. First pipe section; 404. Second pipe section; 405. External thread; 406. Nut; 5. Through hole; 6. Elastic member; 7. Pin; 8. First boss; 9. Second boss; 10. Straight barrel section; a. Workpiece. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] like Figure 2-Figure 8As shown, a stir friction welding simultaneous material filling device is used to be assembled and installed on the main shaft 101 of the stir friction welding equipment, so that when the main shaft 101 drives the stirring needle 102 to perform a downward welding action, the main shaft 101 can drive the material filling device to move downward. When the welding is completed, the main shaft 101 drives the stirring needle 102 to perform an upward resetting action, and the main shaft 101 can drive the material filling device to move upward.

[0041] Specifically, a friction stir welding simultaneous welding material filling device comprises:

[0042] (1) A storage bin 1, wherein a feeding port and a discharge port 2 are respectively arranged at the top and the bottom of the storage bin 1, and the peripheral portion of the storage bin 1 located at the discharge port 2 is in a constricted shape, so that the peripheral portion and the discharge port 2 together constitute a constricted barrel section 3, and thus the powder in the constricted barrel section 3 has a downward discharge movement tendency. A structural design of the storage bin 1 can be used Figure 8 In this representation, the bottom of the storage bin 1 constitutes the small diameter end of the necked barrel section 3, and the horizontal cutout in the middle of the storage bin 1 constitutes the large diameter end of the necked barrel section 3. Of course, the storage bin 1 can also be set to other shapes in the prior art, as long as it satisfies the movement tendency of the powder to move toward the discharge port 2.

[0043] (2) The material guide tube 4 is made of hard material, and the two ends of the material guide tube 4 are respectively set as a plug end 401 and an open end 402. The plug end 401 is inserted at the discharge port 2 in a dynamic sealing form, and the plug end 401 extends into the necking barrel section 3. The plug end 401 has an outer edge extending outward. Under normal circumstances, the outer edge is in a state of fit and contact with the inner wall of the necking barrel section 3 to achieve the blocking of the large diameter end of the necking barrel section 3. This state can be achieved by Figure 5 To represent, on the basis that the discharge port 2 is dynamically sealed by the material guide tube 4, the entirety of the necking barrel section 3 is sealed, that is, the powder on the top of the outer edge cannot enter the necking barrel section 3. When the material guide tube 4 is driven upward relative to the storage bin 1 by an external force, the large diameter end of the necking barrel section 3 is opened, and the powder on the top of the outer edge can flow into the necking barrel section 3 through the gap between the outer edge and the inner wall of the necking barrel section 3. In order to allow the powder in the necking barrel section 3 to be discharged, a through hole 5 for connecting the necking barrel section 3 with the material guide tube 4 is provided on the plug end 401, and the powder in the necking barrel section 3 can flow into the material guide tube 4 through the through hole 5, and finally be discharged from the open end 402 on the material guide tube 4. This state can be represented by Figure 3 To express.

[0044] Based on the above structure, when the feeding device is used in combination with the friction stir welding equipment, the feeding port of the storage bin 1 is first installed on the main shaft 101, and then the open end 402 of the guide tube 4 is directed toward the stirring needle 102, and the welding direction ( Figure 2From the direction indicated by the arrow in the middle, the opening end 402 is always located at the front end of the stirring needle 102. This state can be Figure 2 To indicate that when the stirring needle 102 moves along the welding direction, the open end 402 can always fill the powder into the gap between the two workpieces a located at the front end of the stirring needle 102, thereby realizing the automatic feeding function during the welding process. The combined use of the feeding device and the stir friction welding equipment is described as follows:

[0045] Figure 5 The state shown is the situation that the feeding device is arranged on the main shaft 101 and does not move downward with the stirring needle 102. At this time, under the action of the gravity of the guide tube 4 and the gravity of the plug end 401, the outer edge of the plug end 401 is in a state of conflict with the inner wall of the necking barrel section 3, so as to seal the necking barrel section 3. When the main shaft 101 drives the stirring needle 102 downward to move downward until the stirring needle 102 is inserted into the gap between the two workpieces a, the open end 402 of the guide tube 4 will conflict with the surface of the workpiece a, and then the guide tube 4 will be pushed upward, so that the guide tube 4 and the storage bin 1 will move relative to each other, and then the outer edge of the plug end 401 on the guide tube 4 will have a gap with the inner wall of the necking barrel section 3, and the powder on the top of the outer edge of the plug end 401 will fall into the necking barrel section 3 through the gap, and finally be discharged to the open end 402 through the through hole 5 and fill the gap between the two workpieces a.

[0046] In this embodiment, when the main shaft 101 drives the stirring needle 102 to perform a downward thrust, the workpiece a can also exert an upward pushing force on the downward material guide tube 4, and then when the stirring needle 102 is inserted into the gap between the two workpieces a, the outer edge of the plug end 401 can open the necking barrel section 3, so that the powder in the storage bin 1 can enter the necking barrel section 3. If the necking barrel section 3 and the material guide tube 4 are regarded as a pressing discharge structure, the material cavity in this pressing discharge structure is in the upper position and the discharge port is in the lower position. The setting of this discharge structure can be well adapted to the working conditions of the stir friction welding equipment. The setting of the material cavity in the upper position can not only realize the feeding of powder under the action of gravity, but also facilitate the staff to add material therein. Furthermore, by setting the storage bin 1 to be made of a transparent material, it can be better facilitated for observation by the staff.

[0047] Embodiment 2:

[0048] like Figure 3 and Figure 5As shown, in the design of the first embodiment, the necked barrel section 3 relies on the gravity of the guide tube 4 and the plug end 401 to achieve airtight sealing. This embodiment adds an elastic member 6 on the basis of the first embodiment. The elastic member 6 is used to make the plug end 401 of the guide tube 4 have a movement tendency to move toward the open end 402. The elastic member 6 is used to exert a vertical downward force on the guide tube 4 to cooperate with the gravity of the guide tube 4 to jointly act on the guide tube 4. Specifically, when the main shaft 101 drives the stirring needle 102 to perform a downward piercing action, the guide tube 4 will be pushed upward by the workpiece a, and a gap will be generated between the outer edge of the plug end 401 and the inner wall of the necking barrel section 3, and the elastic member 6 will be compressed at this time; and then when the welding is completed, when the main shaft 101 drives the stirring needle 102 to perform an upward reset action, under the action of the guide tube 4's own gravity and the elastic reset action of the elastic member 6 on the guide tube 4, the guide tube 4 can be quickly driven to move downward, thereby achieving rapid sealing of the necking barrel section 3 by the outer edge of the plug end 401, and isolating the powder in the storage bin 1.

[0049] Regarding the arrangement of the elastic member 6, the elastic member 6 can be arranged as any component with elastic properties, such as a rubber strip, a return spring, etc. Taking the elastic member 6 as an example, in order to facilitate the installation of the return spring, a first boss 8 is arranged at the discharge port 2, and a second boss 9 is arranged on the guide tube 4. The return spring is sleeved on the guide tube 4, and the two ends of the return spring are fixedly connected to the first boss 8 and the second boss 9, respectively, wherein, Figure 5 to Figure 3 The change of state may represent the process of the return spring being compressed.

[0050] Embodiment three:

[0051] like Figure 3-Figure 6 As shown, under the design of any of the above embodiments, the necked barrel section 3 relies on the through hole 5 on the guide tube 4 to communicate with the inner cavity of the guide tube 4 to transport the powder to the open end 402. Based on any of the above embodiments, this embodiment adds a shielding member for changing the powder transported by the through hole 5 per unit time, and the shielding member is used to shield the through hole 5 to change the amount of powder transported by the through hole 5 per unit time.

[0052] Specifically, the shielding member includes a pin 7 threadedly mounted on the plug end 401, one end of the pin 7 extends into the guide tube 4, and the end of the pin 7 can move to the through hole 5 and shield the through hole 5. This installation state can be Figure 4To represent. In the case where the pin 7 is not provided, the through hole 5 conveys the powder by virtue of its aperture size, and the aperture size of the through hole 5 is constant, and thus the amount of powder conveyed per unit time is constant; in the case where the pin 7 is provided and the bottom end of the pin 7 extends to the passing area in the through hole 5, the bottom end of the pin 7 will block the passing area of ​​the through hole 5, and thus is equivalent to changing the aperture size of the through hole 5. This form of change can change the amount of powder conveyed per unit time. This embodiment relies on this adjustment setting to change the amount of powder conveyed per unit time by the open end 402 of the guide tube 4, and thus can adapt to gaps of different sizes generated under different working conditions.

[0053] Embodiment 4:

[0054] like Figure 7 As shown, the difference between this embodiment and any of the above embodiments is that in this embodiment, the material guide tube 4 is configured to be composed of a first tube segment 403 and a second tube segment 404 that are detachably connected, and the second tube segment 404 is configured as a whole to be in a bent state. The bent state setting can, on the one hand, make the open end 402 of the second tube segment 404 after installation face the stirring needle 102, and on the other hand, avoid the main shaft 101 and the stirring needle 102.

[0055] It should be noted that the disassembly and installation method of the first pipe segment 403 and the second pipe segment 404 can be any method in the prior art, such as threaded connection, buckle connection, etc., and this article takes threaded connection as an example for explanation. Specifically: the first pipe segment 403 is dynamically sealed and plugged at the discharge port 2, the plug end 401 is set at the top position of the first pipe segment 403, and the bottom position of the first pipe segment 403 is provided with an external thread 405; one end of the second pipe segment 404 is set to be a trumpet shape for sleeved at the bottom end of the first pipe segment 403, and a nut 406 is sleeved on the second pipe segment 404, so that when the second pipe segment 404 is sleeved with the end of the first pipe segment 403, the nut 406 can cooperate with the external thread 405 to lock the first pipe segment 403 and the second pipe segment 404.

[0056] Embodiment five:

[0057] like Figure 8 As shown, the difference between this embodiment and any of the above embodiments is that in this embodiment, a straight barrel segment 10 is provided at the discharge port 2 of the storage bin 1. The straight barrel segment 10 has the same diameter as the discharge port 2 and is coaxially arranged. At the same time, under the design of this straight barrel segment 10, the first boss 8 mentioned above can be set at the bottom of the straight barrel segment 10.

[0058] like Figure 5As shown, under normal conditions, the outer edge of the plug end 401 fits and contacts the inner wall of the necking barrel section 3 to achieve the blocking of the necking barrel section 3. At this time, the through hole 5 will be in the straight barrel section 10, but because the gap between the straight barrel section 10 and the material guide tube 4 is very small, the straight barrel section 10 can seal the through hole 5. Even if powder is accumulated in the buffer temporary storage area formed between the necking barrel section 3, the discharge port 2 and the outer edge of the plug end 401, at this time, due to the sealing effect of the straight barrel section 10 on the through hole 5, powder will not enter the through hole 5. In summary, in this embodiment, with the coordinated use of the outer edge of the plug end 401 and the straight barrel section 10, the material guide tube 4 that is not normally working can have good sealing properties, and even have good isolation properties between it and the storage bin 1.

[0059] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A friction stir welding and welding repair device, characterized in that: The device comprises a material storage bin (1) arranged on a main shaft (101), and the peripheral portion of the material storage bin (1) located at a discharge port (2) is in a constricted shape, so that the peripheral portion and the discharge port (2) together constitute a constricted barrel section (3), and the device also comprises a material guide tube (4) having a plug end (401) and an open end (402), the plug end (401) being dynamically sealed and plugged into the discharge port (2) and extending into the constricted barrel section (3), and the outer edge of the plug end (401) is in a fit-and-contact state with the inner wall of the constricted barrel section (3), so that the constricted barrel section (3) is in a fit-and-contact state. The barrel section (3) is sealed, and a through hole (5) for connecting the necked barrel section (3) with the guide tube (4) is provided on the plug end (401). The open end (402) extends toward the stirring needle (102) and is opposite to the stirring needle (102), so that when the open end (402) moves downward with the main shaft (101) to contact with the workpiece (a) and generates a vertical displacement with the main shaft (101), the outer edge of the plug end (401) is driven to move toward the large diameter end of the necked barrel section (3) to open the necked barrel section (3).

2. A friction stir welding and welding repair device according to claim 1, characterized in that: The device further comprises an elastic member (6) connected to the material storage bin (1) and the material guide tube (4), wherein the elastic member (6) is used to enable the plug end (401) of the material guide tube (4) to have a movement tendency to move towards the open end (402).

3. A friction stir welding and welding repair device according to claim 1 or 2, characterized in that: The plug end (401) is provided with a shielding member, which is used to shield the through hole (5).

4. A friction stir welding and welding repair device according to claim 3, characterized in that: The shielding member comprises a pin (7) threadedly mounted on the plug end (401), one end of the pin (7) extending into the material guide tube (4), and the end of the pin (7) can move to the through hole (5) and shield the through hole (5), so that when the pin (7) performs a rotational movement, the shielding area of ​​the through hole (5) by the end of the pin (7) becomes larger or smaller.

5. The friction stir welding simultaneous welding material filling device according to claim 2, characterized in that: The elastic member (6) is a return spring, a first boss (8) is provided at the discharge port (2), a second boss (9) is provided on the material guide tube (4), the return spring is sleeved on the material guide tube (4), and two ends of the return spring are fixedly connected to the first boss (8) and the second boss (9) respectively.

6. A friction stir welding simultaneous welding filling device according to claim 1 or 2, characterized in that: The material guide tube (4) is composed of a first tube section (403) and a second tube section (404) which are detachably connected, and the second tube section (404) is bent as a whole so that the open end (402) on the second tube section (404) faces the stirring needle (102).

7. The friction stir welding simultaneous welding material filling device according to claim 6, characterized in that: The first pipe section (403) is arranged at the discharge port (2), and its bottom end is provided with an external thread (405); one end of the second pipe section (404) is arranged in a trumpet shape for sleeve-fitting the bottom end of the first pipe section (403), and a nut (406) is sleeved on the second pipe section (404), so that when the second pipe section (404) is sleeved with the end of the first pipe section (403), the nut (406) can cooperate with the external thread (405) to lock the first pipe section (403) and the second pipe section (404).

8. The friction stir welding simultaneous welding material filling device according to claim 1, characterized in that: The material guiding tube (4) is made of hard material.

9. The friction stir welding simultaneous welding material filling device according to claim 5, characterized in that: A straight barrel section (10) is provided at the discharge port (2) of the storage bin (1), and the straight barrel section (10) is arranged coaxially and codiametrically with the discharge port (2), so that when the outer edge of the plug end (401) and the inner wall of the necked barrel section (3) are in a fit and contact state, the through hole (5) is located in the straight barrel section (10).

10. The friction stir welding simultaneous welding material filling device according to claim 9, characterized in that: The first boss (8) is arranged at the discharge port (2) via a straight tube section (10).

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