Friction welding stirring head convenient to disassemble

Abstract

The utility model discloses a friction welding stirring head convenient to disassemble, which belongs to the technical field of stirring friction welding equipment and comprises a rotating shaft, a shaft sleeve and a stirring head, and a micro shaft shoulder is integrally arranged at the end of the rotating shaft and drives the micro shaft shoulder to rotate synchronously. And a stirring head is mounted in the micro shaft shoulder, and is clamped in the micro shaft shoulder through a pin shaft. When equipment runs, due to the fact that the spiral groove is formed in the outer portion of the stirring head, the micro shaft shoulder is rotationally arranged in the shaft sleeve, the discharging port is formed in the side portion of the shaft sleeve, and generated welding slag or metal chippings can be discharged out of the discharging port through the spiral groove. When metal chippings enter a gap between the stirring head and the rotating shaft and the stirring head is difficult to take out, the stirring head in the rotating shaft can be ejected out by inserting the inserting rod into the inserting hole. The stirring head has the advantages of being novel in structure and convenient and fast to maintain, and the problem that in the prior art, the stirring head is difficult to disassemble due to the fact that molten metal blocks the stirring head is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of friction stir welding equipment, specifically to a friction welding stirring head that is easy to disassemble. Background Technology

[0002] Friction stir welding, as an emerging welding method, is widely used in the welding of dissimilar metal materials. The static shoulder stirring head device, as a key component in friction stir welding, directly affects the welding quality and welding efficiency through its design and performance.

[0003] Currently, most of the existing stirring head devices on the market are used for welding metals such as aluminum and steel. However, for welding dissimilar alloys of copper and aluminum, since copper and aluminum are relatively soft and have low melting points at room temperature, some molten metal will flow out along the length of the stirring head during the welding process. Under the action of centrifugal force of the stirring head, it will enter the connection position between the rotating shaft and the stirring head, blocking the gap between the stirring head and the rotating shaft, making it difficult to remove the stirring head. Utility Model Content

[0004] Therefore, this utility model provides a friction welding stirring head that is easy to disassemble, in order to solve the problem in the prior art that the stirring head is difficult to disassemble due to the molten metal blocking the gap between the stirring head and the rotating shaft.

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

[0006] This utility model discloses a friction welding stirring head that is easy to disassemble, comprising:

[0007] A rotating shaft with a micro-shoulder at its end, wherein the rotating shaft and the micro-shoulder are integrally formed coaxially.

[0008] The bushing has a discharge port on its side, and the micro shoulder is fitted inside the bushing and is adapted to rotate within the bushing.

[0009] The stirring head is fixedly engaged at its end within the micro-shoulder by a pin and rotates synchronously with the rotating shaft.

[0010] The rotating shaft has a socket at its axis, and a rod is inserted into the socket to push the stirring head out of the rotating shaft.

[0011] Furthermore, the stirring head includes:

[0012] The stirring needle has a spiral groove on its outer side and a cone-shaped body at its head.

[0013] A tangent plane is provided on the outside of the cone-shaped body, and the number of tangent planes is several and connected to the spiral groove;

[0014] During the rotation of the stirring head, it rubs against the molten base material and stirs the dissimilar copper-aluminum alloy in the weld. Excess mixed plasticized metal generated during the welding process is discharged from the discharge port through the spiral groove.

[0015] Furthermore, the stirring needle is characterized in that it has a locking position at its tail end, and the locking position has a pin hole extending through it in a direction perpendicular to the axis of the stirring head.

[0016] Furthermore, the rotating shaft includes:

[0017] The shaft body has an end integrally formed with the micro-shoulder, and an installation groove is provided inside the end of the shaft body that passes through the micro-shoulder, suitable for inserting the stirring needle. The shaft body has a discharge port that communicates with the installation groove.

[0018] The snap-fit ​​groove has a bolt hole on the outside, and the bolt hole is aligned with the pin hole.

[0019] The snap-fit ​​groove is located at the bottom of the mounting groove. The snap-fit ​​groove is adapted to mate with the snap-fit ​​position and is positioned by simultaneously inserting a pin into the bolt hole and the pin hole.

[0020] Furthermore, the bushing includes:

[0021] The sleeve has a discharge port on its side, from which metal debris is discharged.

[0022] A clamping port is provided at the end of the sleeve body, and a shoulder is provided on the outer side of the sleeve body, with a screw hole provided on the shoulder.

[0023] Furthermore, the micro-shoulder is rotatably provided inside the clamping port, and the fit tolerance between the micro-shoulder and the clamping port is less than 0.2mm.

[0024] This utility model has the following advantages:

[0025] This utility model discloses an easily disassembled friction welding stirring head, which mainly connects the rotating shaft and the stirring head by inserting a pin, thereby achieving locking. Simultaneously, a bushing is fitted around the rotating shaft to prevent the pin from dislodging, thus ensuring a secure assembly of the rotating shaft and the stirring head. When disassembling the stirring head, a insertion hole is provided at the axis of the rotating shaft; inserting a suitable rod into the hole allows the stirring head to be pushed out from within the rotating shaft. Compared to existing technologies that use fasteners to fix the stirring head, this utility model has the advantages of novel structure and convenient maintenance, solving the problem in existing technologies where molten metal during friction welding blocks the gap between the stirring head and the rotating shaft, leading to difficult disassembly of the stirring head. Attached Figure Description

[0026] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0028] Figure 1 A perspective view of the high-efficiency static shaft stirring head device provided by this utility model;

[0029] Figure 2 A perspective view of the bushing provided for this utility model;

[0030] Figure 3 This is a perspective view of the rotating shaft provided in this utility model;

[0031] Figure 4 A perspective view of the stirring head provided for this utility model;

[0032] Figure 5 A schematic diagram of the pin usage provided in this utility model;

[0033] In the diagram: 1. Shaft; 11. Shaft body; 12. Mounting groove; 13. Snap-fit ​​groove; 14. Discharge port; 15. Bolt hole; 2. Shaft sleeve; 21. Sleeve body; 22. Shaft shoulder; 23. Screw hole; 24. Clamping port; 3. Stirring head; 31. Stirring needle; 32. Cutting plane; 33. Conical body; 34. Snap-fit ​​position; 35. Pin hole; 4. Micro-shaft shoulder; 5. Pin shaft; 6. Discharge port; 7. Spiral groove; 8. Insertion hole; 9. Insert rod. Detailed Implementation

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Please refer to this as well. Figures 1-5This utility model discloses an easily disassembled friction welding stirring head. It welds two dissimilar metals using a friction stir welding process, and the mixed, plasticized metal debris generated during the friction welding process is discharged upwards through a spiral groove. This reduces the pressure on the base material and the stationary shoulder of the stirring head, lessens wear, and thus improves the service life of the welding head. The technical solution of this utility model will be described below with specific embodiments.

[0036] In one specific embodiment disclosed in this utility model, such as Figure 1 The high-efficiency static shaft stirring head device includes a rotating shaft 1, a bushing 2, and a stirring head 3. The rotating shaft 1 has a micro-shoulder 4 at its end, which is coaxially and integrally formed with the micro-shoulder 4 to drive its rotation. The stirring head 3 is installed inside the micro-shoulder 4, with its end fixedly engaged within it to rotate synchronously with the rotating shaft 1. A spiral groove 7 is provided on the outside of the stirring head 3. Structurally, the micro-shoulder 4 is rotatably positioned inside the bushing 2, and a discharge port 6 is provided on the side of the bushing 2. When the stirring head 3 performs rotary welding, the spiral groove 7 discharges welding slag or metal debris generated during the welding process from the discharge port 6. Specifically, the stirring head 3 generates high temperatures through friction during rotation, melting the base material and stirring the dissimilar copper-aluminum alloy in the weld. Excess mixed and plasticized metal generated during the welding process is discharged from the discharge port 6 through the spiral groove 7.

[0037] In some embodiments, such as Figure 4 The stirring head 3 includes a stirring pin 31 and a cutting surface 32. The stirring pin 31 has a spiral groove 7 on its side, and the head of the stirring pin 31 is integrally formed with the cone 33. The outer side of the cone 33 has a cutting surface 32, which is several in number and connected to the spiral groove 7. Since the stirring pin 31 is located inside the micro-shoulder 4, there is a large gap between the cutting surface 32 and the interior of the micro-shoulder 4. During the rotation of the stirring pin 31, the excess mixed plasticized metal generated can enter the spiral groove 7 through the cutting surface 32, thereby discharging the welding waste and reducing wear on the micro-shoulder 4.

[0038] In this embodiment, the tail end of the stirring needle 31 is provided with a snap-fit ​​position 34, and a pin hole 35 is provided through the snap-fit ​​position 34. On the other hand, a bolt hole 15 is provided on the outside of the snap-fit ​​groove 13 on the rotating shaft 1, and the bolt hole 15 is aligned with the pin hole 35. In use, the snap-fit ​​groove 13 can mate with the snap-fit ​​position 34, and the pin 5 can be inserted into both the bolt hole 15 and the pin hole 35 at the same time. Since the bushing 2 covers the outside of the pin 5, it can prevent the pin 5 from falling out. This allows the stirring needle 31 to be reliably installed in the rotating shaft 1, thus preventing the stirring needle 31 from falling out.

[0039] In this embodiment, the rotating shaft 1 includes a shaft body 11 and a snap-fit ​​groove 13. The end of the shaft body 11 is integrally formed with a micro-shoulder 4. The end of the micro-shoulder 4 is provided with a mounting groove 12, which passes through the micro-shoulder 4 and is suitable for inserting a stirring needle 31. A spiral groove 7 is provided on the outside of the stirring needle 31, and a discharge port 14 is provided on the outside of the shaft body 11. The discharge port 14 communicates with the mounting groove 12, thereby exposing the spiral groove 7 so that welding waste can be discharged outward.

[0040] In one specific embodiment disclosed in this utility model, such as Figure 3 and Figure 5 A socket 8 is provided at the axis of the shaft 11, which communicates with the snap-fit ​​groove 13. When the stirring needle 31 inside the shaft 11 is difficult to disassemble due to blockage by waste residue, a rod 9 can be inserted into the socket 8 to push out the stirring head 3 in the snap-fit ​​groove 13, thereby effectively improving the maintainability of the entire device.

[0041] In one specific embodiment disclosed in this utility model, such as Figure 2 The bushing 2 includes a sleeve body 21 and a clamping port 24. The sleeve body 21 has a discharge port 6 on its side. Since the shaft 11 rotates within the sleeve body 21, and the discharge port 6 on the sleeve body 21 coincides with the discharge port 14 of the shaft 11 during rotation, the welding waste can be fully discharged outwards under the action of the spiral groove 7 and centrifugal force. This effectively avoids welding waste slag remaining in the spiral groove 7, which could block waste discharge. On the other hand, a clamping port 24 is provided at the end of the sleeve body 21 to limit the micro-shoulder 4. The micro-shoulder 4 is rotatably disposed within the clamping port 24, and the fit tolerance between the micro-shoulder 4 and the clamping port 24 is less than 0.2 mm. A shoulder 22 is provided on the outer side of the sleeve body 21, and a screw hole 23 is provided on the shoulder 22 to allow the sleeve body 21 to be installed on the welding equipment.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A friction welding stirring head that is easy to disassemble, characterized in that, include: A rotating shaft (1) is provided with a micro-shoulder (4) at its end, and the rotating shaft (1) and the micro-shoulder (4) are coaxially integrally formed; The bushing (2) has a discharge port (6) on its side. The bushing (2) is fitted with the micro shoulder (4) inside, and the micro shoulder (4) is adapted to rotate inside the bushing (2). The stirring head (3) is fixedly engaged at its end in the micro-shoulder (4) by a pin (5) and rotates synchronously with the rotating shaft (1); The rotating shaft (1) has an insertion hole (8) at its axis, and the insertion hole (8) is suitable for inserting a rod (9) to push out the stirring head (3) inside the rotating shaft (1).

2. The easily detachable friction welding stirring head as described in claim 1, characterized in that, The stirring head (3) includes: The stirring needle (31) has a spiral groove (7) on its outer side, and a cone (33) is provided at the head end of the stirring needle (31); A cutting plane (32) is provided on the outside of the cone (33), and there are several cutting planes (32) connected to the spiral groove (7); During the rotation of the stirring head (3), it rubs against the molten base material and stirs the copper-aluminum dissimilar alloy in the weld. The excess mixed plasticized metal generated during the welding process is discharged from the discharge port (6) through the spiral groove (7).

3. The easily disassembled friction welding stirring head as described in claim 2, characterized in that, The stirring needle (31) has a locking position (34) at its tail end, and the locking position (34) has a pin hole (35) through it in a direction perpendicular to the axis of the stirring head (3).

4. The easily disassembled friction welding stirring head as described in claim 3, characterized in that, The rotating shaft (1) includes: The shaft (11) is integrally formed with the micro-shoulder (4) at its end. The end of the shaft has a mounting groove (12) that passes through the micro-shoulder (4) and is suitable for inserting the stirring needle (31). The shaft (11) has a discharge port (14) that communicates with the mounting groove (12). The snap-fit ​​groove (13) has a bolt hole (15) on the outside, and the bolt hole (15) is aligned with the pin hole (35); The snap-fit ​​groove (13) is located at the bottom of the mounting groove (12). The snap-fit ​​groove (13) is adapted to mate with the snap-fit ​​position (34) and is positioned by simultaneously inserting the pin hole (15) and the pin hole (35) through the pin shaft (5).

5. The easily detachable friction welding stirring head as described in claim 4, characterized in that, The bushing (2) includes: The sleeve (21) has the discharge port (6) on its side, and the metal scraps in the discharge port (14) are discharged from the discharge port (6); A clamping port (24) is provided at the end of the sleeve (21), and a shoulder (22) is provided on the outside of the sleeve (21), and a screw hole (23) is provided on the shoulder (22).

6. The easily detachable friction welding stirring head as described in claim 5, characterized in that, The micro-shoulder (4) is rotatably provided inside the clamping port (24), and the fit tolerance between the micro-shoulder (4) and the clamping port (24) is less than 0.2 mm.

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