Friction stir welding tool

Abstract

The utility model relates to the technical field of welding tools, in particular to a friction stir welding tool which comprises a bottom plate, mounting blocks are slidably arranged on the bottom plate, the two mounting blocks are symmetrically arranged on the two sides of the bottom plate, a pushing air cylinder is mounted on the bottom plate, a piston rod of the pushing air cylinder is connected with a first connecting seat, and the first connecting seat is connected with the mounting blocks. The mounting block is rotatably connected with two turntables, the two turntables are oppositely arranged in parallel, the mounting block is provided with a rotating assembly used for driving the turntables to rotate, the turntables are connected with a fixing plate, the fixing plate is connected with a fixing frame, the fixing frame is arranged in a cross shape, and the fixing frame is slidably provided with a supporting plate used for abutting against the inner wall of the barrel. The four supporting plates correspond to the periphery of the fixing frame, and a driving assembly used for driving the supporting plates to expand outwards or fold is arranged between the fixing frame and the rotary disc. The friction welding tool has the effects that the friction welding tool can conveniently clamp and fix the barrel, the barrel can be rotated, and the use safety of the friction welding tool is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, and in particular to a friction stir welding fixture. Background Technology

[0002] Friction stir welding refers to the use of heat generated by the friction between a high-speed rotating welding tool and the workpiece to locally melt the materials to be welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear of the welding tool under the action of the rotational friction force of the welding tool, and forms a dense solid phase weld under the extrusion of the welding tool.

[0003] Currently, it is mainly used for planar welding. It is rarely used for cylindrical welding because it is difficult to control and the fixing is also quite complicated. If it is manually rotated, the safety is not high. Utility Model Content

[0004] In order to facilitate the clamping and fixing of the cylinder and enable the cylinder to rotate, thereby improving the safety of its use, this application provides a friction stir welding fixture.

[0005] The friction stir welding fixture provided in this application adopts the following technical solution:

[0006] A friction stir welding fixture includes a base plate with mounting blocks slidably mounted on it. Two mounting blocks are symmetrically arranged on both sides of the base plate. A push cylinder is mounted on the base plate, and a first connecting seat is connected to the piston rod of the push cylinder. The first connecting seat is connected to the mounting blocks. A turntable is rotatably connected to the mounting blocks, and the two turntables are arranged in parallel relative to each other. A rotating assembly for driving the turntables to rotate is provided on the mounting blocks. A fixed plate is connected to the turntables, and a fixed frame is connected to the fixed plate. The fixed frame is arranged in a cross shape, and a support plate for abutting against the inner wall of the cylinder is slidably mounted on the fixed frame. Four support plates are arranged around the fixed frame. A driving assembly for driving the support plates to expand or retract is provided between the fixed frame and the turntables.

[0007] Preferably, the support plate is provided with rounded corners, which are located at the corners where the support plate contacts the cylinder.

[0008] Preferably, the rotating assembly includes a fixed bearing, a connecting shaft, a second connecting seat, and a rotating motor. The fixed bearing is connected to the mounting block, the connecting shaft is connected inside the fixed bearing, the second connecting seat is connected to one end of the connecting shaft and is connected to the turntable, the rotating motor is connected to the mounting block, and the output shaft of the rotating motor is coaxially connected to the other end of the connecting shaft via a coupling.

[0009] Preferably, a CNC slip ring is connected to the connecting shaft, a limit plate is connected to the outer ring end of the CNC slip ring, a fixing block is connected to the fixed bearing, a limit rod is connected to the fixing block, the limit rod is locked onto the limit plate, and a limit groove for locking the limit rod is provided on the limit plate.

[0010] Preferably, a sliding plate is connected to the support plate, the sliding plate is located at the end of the support plate, the sliding plate is T-shaped, and the fixing frame is provided with a groove for the sliding plate to pass through and slide.

[0011] Preferably, the drive assembly includes a drive motor, a threaded rod, a threaded sleeve, a mounting plate, and a connecting rod. The drive motor is connected to the turntable, and the axis of the output shaft of the drive motor is collinear with the axis of the turntable. The threaded rod is coaxially connected to the threaded rod via a coupling. The fixing frame has a through hole for the threaded rod to pass through. The threaded sleeve is sleeved on the threaded rod. The mounting plate is fixedly connected to the threaded sleeve. The mounting plate is arranged along the length direction of the threaded sleeve, and four mounting plates are evenly arranged along the circumference of the threaded sleeve. One end of the connecting rod is hinged to the mounting plate by a pin, and the other end is hinged to the support plate by a pin. There is one connecting rod at each end of the mounting plate.

[0012] Preferably, a spring is sleeved on the outside of the threaded rod, with one end of the spring abutting against the threaded sleeve and the other end abutting against the fixing frame.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] This utility model provides a friction stir welding fixture, including a base plate, a mounting block, a push cylinder, a first connecting seat, a turntable, a rotating assembly, a fixed plate, a fixed frame, a support plate, and a drive assembly. When assembling the cylinders, two cylinders are respectively fitted onto the outside of the support plate, with the ends of the cylinders abutting against the fixed frame. Then, the drive assembly drives the support plate to expand and support the inner wall of the cylinder, thus fixing and supporting the cylinder. Next, the push cylinder pushes the mounting block and the cylinders on the mounting block to move, so that the two cylinders are in contact on the same axis. During friction welding, the rotating assembly rotates the cylinders to weld the contact surfaces of the two cylinders, thereby achieving the effect of making the friction welding fixture easy to clamp and fix the cylinders and able to rotate the cylinders, improving its safety in use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the friction stir welding fixture in the embodiments of this application;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0018] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Mounting block; 3. Push cylinder; 31. First connecting seat; 4. Turntable; 41. Fixing plate; 411. Fixing frame; 5. Rotating assembly; 51. Fixed bearing; 511. Fixing block; 5111. Limiting rod; 52. Connecting shaft; 521. CNC slip ring; 5211. Limiting plate; 53. Second connecting seat; 54. Rotating motor; 6. Support plate; 61. Slide plate; 7. Drive assembly; 71. Drive motor; 72. Threaded rod; 721. Spring; 73. Threaded sleeve; 74. Mounting plate; 75. Connecting rod. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] This application discloses a friction stir welding fixture. (Refer to...) Figure 1 , Figure 2 and Figure 3The friction stir welding fixture includes a base plate 1, on which mounting blocks 2 slide. Two mounting blocks 2 are symmetrically arranged on both sides of the base plate 1. A push cylinder 3 is installed on the base plate 1. A first connecting seat 31 is connected to the piston rod of the push cylinder 3. The first connecting seat 31 is connected to the mounting blocks 2. A turntable 4 is rotatably connected to the mounting blocks 2. The two turntables 4 are arranged in parallel relative to each other. A rotating component 5 for driving the turntables 4 to rotate is provided on the mounting blocks 2. A fixed plate 41 is connected to the turntables 4. A fixed frame 411 is connected to the fixed plate 41. The fixed frame 411 is arranged in a "+" shape. A support plate 6 for abutting against the inner wall of the cylinder is slidably arranged on the fixed frame 411. Four support plates 6 are arranged around the fixed frame 411. A driving component 7 for driving the support plates 6 to expand or contract is provided between the fixed frame 411 and the turntables 4.

[0022] The support plate 6 is provided with rounded corners, which are located at the corners where the support plate 6 contacts the cylinder. This design not only prevents the support plate 6 from damaging the inner wall of the cylinder, but also increases the contact area between the support plate 6 and the cylinder, thereby improving the support and fixing effect.

[0023] The rotating assembly 5 includes a fixed bearing 51, a connecting shaft 52, a second connecting seat 53, and a rotating motor 54. The fixed bearing 51 is connected to the mounting block 2, the connecting shaft 52 is connected inside the fixed bearing 51, the second connecting seat 53 is connected to one end of the connecting shaft 52, the second connecting seat 53 is connected to the turntable 4, the rotating motor 54 is connected to the mounting block 2, and the output shaft of the rotating motor 54 is coaxially connected to the other end of the connecting shaft 52 through a coupling.

[0024] A CNC slip ring 521 is connected to the connecting shaft 52. A limit plate 5211 is connected to the outer ring end of the CNC slip ring 521. A fixing block 511 is connected to the fixed bearing 51. A limit rod 5111 is connected to the fixing block 511. The limit rod 5111 is locked on the limit plate 5211. A limit groove is opened on the limit plate 5211 for the limit rod 5111 to be locked. The CNC slip ring 521 facilitates the connection of wires to the circuit equipment on the turntable 4.

[0025] A sliding plate 61 is connected to the support plate 6. The sliding plate 61 is located at the end of the support plate 6 and is T-shaped. The fixing frame 411 has a groove for the sliding plate 61 to pass through and slide. By setting the sliding plate 61 and the groove, the support plate 6 can slide on the fixing frame 411.

[0026] The drive assembly 7 includes a drive motor 71, a threaded rod 72, a threaded sleeve 73, a mounting plate 74, and a connecting rod 75. The drive motor 71 is connected to the turntable 4, and the axis of the output shaft of the drive motor 71 is collinear with the axis of the turntable 4. The threaded rod 72 is coaxially connected to the fixed bracket 411 through a through hole for the threaded rod 72 to pass through. The threaded sleeve 73 is sleeved on the threaded rod 72. The mounting plate 74 is fixedly connected to the threaded sleeve 73. The mounting plate 74 is arranged along the length of the threaded sleeve 73, and four mounting plates 74 are evenly arranged around the circumference of the threaded sleeve 73. One end of the connecting rod 75 is hinged to the mounting plate 74 by a pin, and the other end is hinged to the support plate 6 by a pin. There is one connecting rod 75 at each end of the mounting plate 74.

[0027] A spring 721 is sleeved on the outside of the threaded rod 72. One end of the spring 721 abuts against the threaded sleeve 73, and the other end abuts against the fixing bracket 411. By setting the spring 721, the elastic force of the spring 721 pushes the threaded sleeve 73, which enhances the friction between the threaded sleeve 73 and the threaded rod 72 and helps to improve the reliability of the structure.

[0028] The implementation principle of the friction stir welding fixture in this embodiment is as follows: When assembling the cylinders, two cylinders are respectively fitted onto the outside of the support plate 6, and the ends of the cylinders abut against the fixed frame 411. Then, the drive motor 71 drives the threaded rod 72 to rotate. The threaded sleeve 73 is connected to the support plate 6 through the connecting rod 75, and the support plate 6 is slidably set on the fixed frame 411 through the sliding plate 61. Therefore, under the limiting action, the threaded sleeve 73 can move along the length direction of the threaded rod 72. When the threaded sleeve 73 moves toward the fixed frame 411, it drives the connecting rod 75 to rotate towards the perpendicularity of the threaded sleeve. In the direction of 73, the connecting rod 75 drives the support plate 6 and the sliding plate 61 to move outward, so that the support plate 6 abuts against the inner wall of the cylinder for support and fixation. Then, the push cylinder 3 pushes the mounting block 2 and the cylinder on the mounting block 2 to move, so that the two cylinders are in contact on the same axis. During friction welding, the connecting shaft 52 is driven to rotate by the rotating motor 54. The connecting shaft 52 drives the turntable 4 and the cylinder on the turntable 4 to rotate, which facilitates the welding of the contact surface of the two cylinders. This achieves the effect of making the friction welding fixture easy to clamp and fix the cylinder and able to rotate the cylinder, thus improving its safety in use.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A friction stir welding fixture, characterized in that: Includes a base plate (1), on which mounting blocks (2) slide. Two mounting blocks (2) are symmetrically arranged on both sides of the base plate (1). A push cylinder (3) is mounted on the base plate (1). A first connecting seat (31) is connected to the piston rod of the push cylinder (3). The first connecting seat (31) is connected to the mounting blocks (2). A turntable (4) is rotatably connected to the mounting blocks (2). The two turntables (4) are arranged relatively parallel to each other. The mounting blocks (2) are provided with a mechanism for driving the turntables (2). 4) A rotating component (5) is connected to a fixed plate (41) on the turntable (4). A fixed frame (411) is connected to the fixed plate (41). The fixed frame (411) is arranged in a "+" shape. A support plate (6) for abutting against the inner wall of the cylinder is slidably arranged on the fixed frame (411). Four support plates (6) are arranged around the fixed frame (411). A driving component (7) for driving the support plate (6) to expand or retract is arranged between the fixed frame (411) and the turntable (4).

2. The friction stir welding fixture according to claim 1, characterized in that: The support plate (6) is provided with rounded corners, which are located at the corners where the support plate (6) contacts the cylinder.

3. The friction stir welding fixture according to claim 1, characterized in that: The rotating assembly (5) includes a fixed bearing (51), a connecting shaft (52), a second connecting seat (53), and a rotating motor (54). The fixed bearing (51) is connected to the mounting block (2), the connecting shaft (52) is connected inside the fixed bearing (51), the second connecting seat (53) is connected to one end of the connecting shaft (52), the second connecting seat (53) is connected to the turntable (4), the rotating motor (54) is connected to the mounting block (2), and the output shaft of the rotating motor (54) is coaxially connected to the other end of the connecting shaft (52) through a coupling.

4. The friction stir welding fixture according to claim 3, characterized in that: A CNC slip ring (521) is connected to the connecting shaft (52). A limiting plate (5211) is connected to the outer ring end of the CNC slip ring (521). A fixing block (511) is connected to the fixed bearing (51). A limiting rod (5111) is connected to the fixing block (511). The limiting rod (5111) is locked on the limiting plate (5211). A limiting groove is provided on the limiting plate (5211) for the limiting rod (5111) to be locked.

5. The friction stir welding fixture according to claim 1, characterized in that: A sliding plate (61) is connected to the support plate (6). The sliding plate (61) is located at the end of the support plate (6). The sliding plate (61) is T-shaped. The fixing frame (411) has a groove for the sliding plate (61) to pass through and slide.

6. The friction stir welding fixture according to claim 1, characterized in that: The drive assembly (7) includes a drive motor (71), a threaded rod (72), a threaded sleeve (73), a mounting plate (74), and a connecting rod (75). The drive motor (71) is connected to the turntable (4), and the axis of the output shaft of the drive motor (71) is collinear with the axis of the turntable (4). The threaded rod (72) is coaxially connected to the drive assembly (75) via a coupling. The fixing bracket (411) has a through hole for the threaded rod (72) to pass through. The threaded sleeve... (73) Sleeve onto threaded rod (72), the mounting plate (74) is fixedly connected to threaded sleeve (73), the mounting plate (74) is arranged along the length direction of threaded sleeve (73), and four mounting plates (74) are evenly arranged along the circumference of threaded sleeve (73). One end of the connecting rod (75) is hinged to the mounting plate (74) by a pin, and the other end is hinged to the support plate (6) by a pin. The connecting rod (75) is provided at both ends of the mounting plate (74).

7. The friction stir welding fixture according to claim 6, characterized in that: A spring (721) is sleeved on the outside of the threaded rod (72). One end of the spring (721) abuts against the threaded sleeve (73), and the other end abuts against the fixing frame (411).

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