Novel static shaft shoulder friction stir welding tool
By introducing air-conditioning nozzles and press ring designs into the friction stir welding tool, the solder overflow and cooling problems are solved, ensuring the flatness and firmness of the welds, and improving welding efficiency and quality.
Patent Information
- Application Number
- CN202422318884.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing stir welding tools overflow during the welding process lead to uneven surfaces, and the weld melted solder cannot be cooled and formed quickly, making it prone to offset or cracking.
A new static shaft shoulder friction stir welding tool with air pipes and spray heads was designed to spray air-cooled welds through the spray heads, and extruded solder in combination with press rings to ensure flat and fast cooling of the weld surface.
The rapid cooling of the weld and the surface level are achieved, the weld is offset or cracked, and the welding efficiency and quality are improved.
Smart Images
Figure CN223264963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of friction stir welding, and more specifically to a novel static shoulder friction stir welding tool. Background Art
[0002] Static shoulder friction stir welding adopts a split design of shoulder and stirring pin. The welding tool mainly consists of an internal rotating stirring pin and an external relatively stationary shoulder that moves along the welding direction. As the stirring head moves forward, the molten metal is deposited backward due to the friction heat generated by the material around the stirring pin, and a uniform and dense weld is produced under the action of the shoulder forging force. Static shoulder friction stir welding technology is very suitable for large-thickness materials, fillet weld structures, and high-melting-point material connections. It is a very effective low-heat input forming process. It currently mainly involves butt joints, lap joints, fillet joints, and T-type weld forming of alloys such as aluminum, magnesium, and titanium.
[0003] The shortcomings of the existing technology: During the welding process, the welding surface of the stirring welding tool in the existing technology will melt due to the high temperature, and the molten solder will overflow from the weld, generating slag or unevenness, resulting in an uneven welding surface. The welding surface needs to be polished subsequently, which greatly reduces the welding work efficiency. At the same time, after the welding is completed, the molten solder at the weld cannot be quickly cooled and formed, which can easily cause the weld to shift or crack during movement. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a new static shoulder friction stir welding tool to solve the problem in the above-mentioned background technology that the molten solder overflows from the weld, resulting in an uneven welding surface of the weld material and the molten solder at the weld cannot be quickly cooled and formed.
[0005] The utility model provides the following technical solutions: a new static shoulder friction stir welding tool, comprising a connecting rod and a first connecting flange fixedly connected to the bottom end thereof, the bottom end of the first connecting flange is fixedly connected to a static shaft seat, the bottom end of the static shaft seat is fixedly connected to a second connecting flange, the bottom end of the second connecting flange is fixedly connected to a conical connecting cylinder, the bottom end of the conical connecting cylinder is fixedly connected to a non-rotating component for forging the weld position, one end of the first connecting flange and the second connecting flange are both fixedly connected to a fixing ring, the inner cavities of the two fixing rings are fixedly connected to an air pipe, the bottom end of the air pipe is fixedly connected to a nozzle, the middle part of the bottom end of the non-rotating component is fixedly connected to a pressure ring for smoothing the weld surface, and the bottom end of the pressure ring is set to an arc shape.
[0006] Preferably, a stirring needle is provided at the center axis of the inner cavity of the static shaft seat, the bottom end of the stirring needle is fixedly connected to a stirring head, and the top end of the stirring head is fixedly connected to a limiting block.
[0007] Preferably, the stirring head passes through and is rotatably connected to the central axis of the inner cavity of the pressure ring.
[0008] Preferably, the non-rotating component includes a fixing part fixedly connected to the bottom end of the conical connecting cylinder, a plurality of fastening bolts are fixedly connected to the bottom end of the fixing part in an annular array, a connecting part is fixedly connected to the top end of the inner cavity of the fixing part, the bottom end of the connecting part is fixedly connected to a fastener, and the bottom end of the fastener is fixedly connected to a stirring shaft shoulder.
[0009] Preferably, the position of the stirring head corresponds to the position of the inner cavity center axis of the fixing member and is connected to the inner cavity center axis, and the stirring head passes through the inner cavity center axis of the connecting member, the fastener and the stirring shaft shoulder.
[0010] Preferably, the limit block is located at the top end of the connecting piece, and the pressure ring is fixedly connected to the bottom end of the stirring shaft shoulder.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. The utility model is provided with an air pipe to connect to the external industrial cooling equipment, and the cold air is sprayed out through the nozzle. The position of the nozzle corresponds to the position of the weld. After the welding material is welded by the high-speed rotating stirring head, the weld position is cooled by the nozzle, so that the melted welding material at the weld can be quickly cooled down, ensuring the firmness of the welding position and avoiding the displacement or cracking of the weld position during the movement.
[0013] 2. The utility model extrude the molten solder at the weld by providing a pressure ring. During the welding process of the stirring head, the pressure ring moves with the stirring head and flattens the solder overflowing from the weld through the arc edge provided at the bottom, ensuring that the welding maintains the flatness of the surface and at the same time can increase the welding effect of the weld. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0015] Figure 2 This is a schematic structural diagram of the non-rotating component of the utility model.
[0016] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the present utility model.
[0017] Figure 4 For the utility model Figure 3 A magnified schematic diagram of the structure in the middle.
[0018] The figures are marked as follows: 1. connecting rod; 2. first connecting flange; 3. static shaft seat; 4. second connecting flange; 5. conical connecting cylinder; 6. non-rotating component; 61. fixing part; 62. fastening bolt; 63. connecting part; 64. fastener; 65. stirring shaft shoulder; 7. fixing ring; 8. air pipe; 9. nozzle; 10. stirring needle; 11. stirring head; 12. pressure ring; 13. limit block. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the present invention to clearly and completely describe the technical solutions in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The novel static shoulder friction stir welding tool involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work fall within the scope of protection of the present invention.
[0020] The utility model provides a novel static shoulder friction stir welding tool, such as Figure 1 - Figure 4 As shown, it includes a connecting rod 1 and a first connecting flange 2 fixedly connected to the bottom end thereof, the bottom end of the first connecting flange 2 is fixedly connected to a static shaft seat 3, the bottom end of the static shaft seat 3 is fixedly connected to a second connecting flange 4, the bottom end of the second connecting flange 4 is fixedly connected to a tapered connecting tube 5, the bottom end of the tapered connecting tube 5 is fixedly connected to a non-rotating component 6 for forging the weld position, one end of the first connecting flange 2 and the second connecting flange 4 are both fixedly connected to a fixing ring 7, the inner cavity of the two fixing rings 7 is fixedly connected to an air pipe 8, and the external industrial cooling equipment is connected through the air pipe 8, the bottom end of the air pipe 8 is fixedly connected to a nozzle 9, the position of the nozzle 9 corresponds to the weld position, the weld position is cooled by the nozzle 9, so that the molten welding material at the weld can be quickly cooled and cooled, ensuring the firmness of the welding position and avoiding the situation where the weld position is offset or cracked during movement, a pressure ring 12 for smoothing the weld surface is fixedly connected to the middle of the bottom end of the non-rotating component 6, and the bottom end of the pressure ring 12 is set to an arc shape.
[0021] Further, such as Figure 2 and Figure 3 As shown, a stirring needle 10 is provided at the center axis of the inner cavity of the static shaft seat 3, and the bottom end of the stirring needle 10 is fixedly connected to a stirring head 11, and the top end of the stirring head 11 is fixedly connected to a limiting block 13. The limiting block 13 increases the stability of the stirring head 11 during high-speed rotation. The stirring head 11 penetrates and rotates to be connected to the center axis of the inner cavity of the pressure ring 12. During the welding process, the stirring head 11 and the pressure ring 12 move along to squeeze the solder that melts and overflows the weld during the welding process flat, thereby ensuring the flatness of the weld surface and increasing the tightness of the weld.
[0022] Further, such as Figure 2 As shown, the non-rotating component 6 includes a fixing part 61 fixedly connected to the bottom end of the conical connecting cylinder 5, a plurality of fastening bolts 62 are fixedly connected in a circular array at the bottom end of the fixing part 61, a connecting part 63 is fixedly connected to the top end of the inner cavity of the fixing part 61, a fastener 64 is fixedly connected to the bottom end of the connecting part 63, and a stirring shaft shoulder 65 is fixedly connected to the bottom end of the fastener 64.
[0023] Further, such as Figure 4 As shown, the position of the stirring head 11 corresponds to the position of the inner cavity center axis of the fixing part 61 and is connected to each other. The stirring head 11 passes through the inner cavity center axis of the connecting part 63, the fastener 64 and the stirring shaft shoulder 65. The connecting part 63 and the fastener 64 ensure the stable rotation and precise positioning of the stirring head 11. The stirring shaft shoulder 65 and the stirring head 11 form a welding area, and the welding area is forged by the stirring shaft shoulder 65 to form a high-quality weld.
[0024] Further, such as Figure 4 As shown, the limit block 13 is located at the top end of the connecting piece 63 , and the pressure ring 12 is fixedly connected to the bottom end of the stirring shaft shoulder 65 .
[0025] The working principle of the present invention is as follows: before use, the friction stir welding tool is installed and connected to the friction stir welding equipment through the connecting rod 1, and the air pipe 8 is connected to the external industrial cooling equipment. During welding, the prepared welding material is fixed on the welding workbench, and the stirring head 11 is inserted into the weld and moves forward while rotating at high speed through the friction stir welding equipment, so that the welding material is plasticized and plastic flow occurs under the drive of the stirring head 11. At this time, the pressure ring 12 moves forward with the stirring head 11 and cooperates with the stirring shaft shoulder 65. The arc edge at the bottom end of the pressure ring 12 squeezes and flattens the solder overflowed from the weld due to melting to avoid unevenness on the weld surface. At the same time, the nozzle 9 corresponds to the position of the weld after welding, and the cold air in the industrial cooling equipment connected to the air pipe 8 is sprayed out through the nozzle 9 to cool the weld, so that the weld can be quickly formed to avoid displacement or cracking of the weld caused by movement, thereby ensuring the welding effect of the stirring tool.
[0026] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.
[0027] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.
[0028] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A novel static shoulder friction stir welding tool, comprising a connecting rod (1) and a first connecting flange (2) fixedly connected to the bottom end thereof, characterized in that: The bottom end of the first connecting flange (2) is fixedly connected to a stationary shaft seat (3), the bottom end of the stationary shaft seat (3) is fixedly connected to a second connecting flange (4), the bottom end of the second connecting flange (4) is fixedly connected to a conical connecting cylinder (5), the bottom end of the conical connecting cylinder (5) is fixedly connected to a non-rotating component (6) for forging the weld position, one end of each of the first connecting flange (2) and the second connecting flange (4) is fixedly connected to a fixing ring (7), the inner cavities of the two fixing rings (7) are fixedly connected to an air pipe (8), the bottom end of the air pipe (8) is fixedly connected to a nozzle (9), the middle part of the bottom end of the non-rotating component (6) is fixedly connected to a pressure ring (12) for smoothing the weld surface, and the bottom end of the pressure ring (12) is set to be arc-shaped.
2. The novel static shoulder friction stir welding tool according to claim 1, characterized in that: A stirring needle (10) is provided at the center axis of the inner cavity of the static shaft seat (3), the bottom end of the stirring needle (10) is fixedly connected to a stirring head (11), and the top end of the stirring head (11) is fixedly connected to a limiting block (13).
3. The novel static shoulder friction stir welding tool according to claim 2, characterized in that: The stirring head (11) passes through and is rotatably connected to the center axis of the inner cavity of the pressure ring (12).
4. The novel static shoulder friction stir welding tool according to claim 2, characterized in that: The non-rotating component (6) includes a fixing member (61) fixedly connected to the bottom end of the conical connecting cylinder (5), a plurality of fastening bolts (62) are fixedly connected in an annular array at the bottom end of the fixing member (61), a connecting member (63) is fixedly connected to the top end of the inner cavity of the fixing member (61), a fastener (64) is fixedly connected to the bottom end of the connecting member (63), and a stirring shaft shoulder (65) is fixedly connected to the bottom end of the fastener (64).
5. The novel static shoulder friction stir welding tool according to claim 4, characterized in that: The position of the stirring head (11) corresponds to the position of the inner cavity center axis of the fixing member (61) and is connected to each other. The stirring head (11) passes through the inner cavity center axis of the connecting member (63), the fastener (64) and the stirring shaft shoulder (65).
6. The novel static shoulder friction stir welding tool according to claim 4, characterized in that: The limit block (13) is located at the top end of the connecting piece (63), and the pressure ring (12) is fixedly connected to the bottom end of the stirring shaft shoulder (65).