A friction stir welding device

Abstract

The utility model relates to the technical field of friction stir welding device, and disclose a kind of friction stir welding device, including two pieces of workpiece installed on welding platform, and the one end of two pieces of workpiece weld is equipped with compensation block, compensation block is simultaneously with the abutment of two pieces of workpiece weld end portion, and the one end of compensation block away from two pieces of workpiece is connected with mounting mechanism, and mounting mechanism is connected with two pieces of workpiece.This kind of friction stir welding device, through mounting mechanism, compensation block is abutted in the rear end of two pieces of workpiece welding position, when the friction stir welding head is gradually moved from the other end of two workpiece weld joint to compensation block, compensation block is welded together with two pieces of workpiece, and make the friction stir welding head move out from compensation block, so that the end pit is left in compensation block, subsequently using cutting tool to cut the part of compensation block that protrude outside two pieces of workpiece, perfect welding workpiece can be obtained, improve workpiece welding effect and welding integrity.

Description

Technical Field

[0001] This utility model relates to the technical field of friction stir welding devices, specifically a friction stir welding device. Background Technology

[0002] Friction stir welding is a solid-state joining technique. Before welding, the two or more materials to be welded are fixed in place to ensure a tight fit at the joint, preparing for welding. During welding, a stirring head consisting of a shoulder and a pin is used. The stirring head is pressed against one side of the workpiece joint with a specific pressure and rotated at high speed. Through the friction generated by the rotation, the stirring head heats the surface of the workpiece, bringing the material to a plastic state, but the temperature is always controlled below the material's melting point. Subsequently, the stirring head is gradually inserted into the joint of the two materials in the plastic state. During insertion, the stirring head continues to use rotational friction to further heat and maintain the plasticity of the material. At the same time, the rotational friction force mixes the plastic parts of the two materials together. As the stirring head continues to advance along the joint direction, it continuously "stirs" the materials on both sides of the contact surface, promoting thorough mixing. Finally, a strong welded joint is formed behind the stirring head, completing the entire welding process.

[0003] Patent CN222199236U discloses a friction stir welding device, including a water tank. A support plate and an electric guide rail body are fixedly installed on the top surface of the water tank. A gantry frame is slidably installed on the surface of the electric guide rail body. A first electric push rod is fixedly installed on the top and bottom surfaces of the gantry frame. An extrusion block is fixedly installed on the telescopic end of the first electric push rod. A lifting plate is slidably installed on the front of the extrusion block. A friction welding head body is provided on the surface of the lifting plate. A nozzle and a lifting and cleaning mechanism are fixedly installed on the surface of the lifting plate. A water supply mechanism is fixedly connected between the top of the nozzle and the water tank. Water is supplied to the nozzle through the water supply mechanism. The nozzle moves longitudinally under the action of the support plate and sprays water onto the weld. The water evaporates under high temperature to assist in cooling the weld, effectively accelerating material cooling, increasing the effective working time of the friction stir welding device, and effectively improving welding efficiency.

[0004] However, the friction stir welding apparatus described above still has the following problems: In the friction stir welding process, the stirring head needs to complete the welding task according to a predetermined path and finally be withdrawn from the workpiece. At this time, a noticeable pit often appears at the end of the weld. The reason for this is that the stirring head is composed of a shoulder and a pin. When it is separated from the material, the pin part is pulled out simultaneously, leaving a gap area on the material that precisely matches the shape of the pin. This area is known in the industry as the "exit hole" or "tailing pit". Due to the lack of additional material to fill this gap during the welding finishing stage, the area presents a concave shape. This pit will damage the flatness and integrity of the weld, adversely affecting the mechanical properties, sealing performance, and appearance quality of the welded workpiece in actual applications, and reducing its overall performance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a friction stir welding device that improves the friction stir welding effect on workpieces.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a friction stir welding device, comprising two workpieces mounted on a welding table, a compensation block provided at one end of the weld seam of the two workpieces, the compensation block simultaneously abutting against the ends of the weld seam of the two workpieces, and an installation mechanism connected to the end of the compensation block away from the two workpieces, the installation mechanism being connected to the two workpieces.

[0007] Furthermore, the installation mechanism includes a clamping assembly, a connecting assembly, and an adjusting assembly. The clamping assembly is used to clamp and fix the compensation block, the connecting assembly is connected to the weld ends of the two workpieces, and the adjusting assembly is used to adjust the distance between the clamping assembly and the connecting assembly on the connecting assembly and to press the compensation block against the weld ends of the two workpieces.

[0008] Furthermore, the clamping assembly includes a U-shaped clamp and a threaded clamp rod. The end of the compensation block away from the weld of the two workpieces is located inside the U-shaped clamp. The threaded clamp rod passes through the side wall of one end of the U-shaped clamp and abuts against the compensation block. The threaded clamp rod is threadedly connected to the U-shaped clamp.

[0009] Furthermore, a clamping plate is fixedly connected to one end of the threaded clamp rod near the compensation block. The side of the clamping plate away from the threaded clamp rod abuts against one side of the compensation block, and the other side of the compensation block abuts against the inner wall of the other end of the U-shaped clamp.

[0010] Furthermore, a first hand-tightening nut is fixedly connected to the end of the threaded clamp rod away from the compensation block.

[0011] Furthermore, the connecting assembly includes a U-shaped connecting frame and two connecting blocks. The two connecting blocks are fixedly connected to both ends of the U-shaped connecting frame, and the two connecting blocks are fixedly connected to the two workpieces respectively by adhesive on the side away from the U-shaped connecting frame. The adjusting assembly passes through the side of the U-shaped connecting frame away from the workpiece and is connected to the U-shaped clamp.

[0012] Furthermore, the adjustment assembly includes an adjustment screw and a T-shaped rotating block. A T-shaped rotating groove is provided on the side of the U-shaped clamp away from the compensation block. The T-shaped rotating block is rotatably connected to the T-shaped rotating groove. The thinner end of the T-shaped rotating block passes through the T-shaped rotating groove and is fixedly connected to the adjustment screw. The other end of the adjustment screw passes through the U-shaped connecting frame and is threadedly connected to the U-shaped connecting frame.

[0013] Furthermore, a second hand-tightening cap is fixedly connected to the end of the adjusting screw away from the U-shaped clamp.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This friction stir welding device uses an installation mechanism to place a compensation block against the rear end of the welding position of two workpieces. When the friction stir welding head gradually moves from the other end of the weld seam of the two workpieces to the compensation block, the compensation block is welded to the two workpieces, and the friction stir welding head is moved out of the compensation block, leaving the finishing pit inside the compensation block. Then, a cutting tool is used to cut off the part of the compensation block that protrudes from the two workpieces, so as to obtain a perfect welded workpiece and improve the welding effect and welding integrity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance and connection structure of this utility model;

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of the connection structure at point A in the middle;

[0018] Figure 3 This is a schematic diagram of the connection structure of the installation mechanism of this utility model;

[0019] Figure 4 This is an exploded view of the connection structure of the installation mechanism of this utility model.

[0020] In the diagram: 1. Welding table; 2. Workpiece; 3. Compensation block; 4. Installation mechanism; 5. Clamping assembly; 6. Connecting assembly; 7. Adjusting assembly; 51. U-shaped clamp; 52. Threaded clamp rod; 53. Clamping plate; 54. First hand-tightening cap; 61. U-shaped connecting frame; 62. Connecting block; 71. Adjusting screw; 72. T-shaped rotating block; 73. Second hand-tightening cap; 501. T-shaped rotating groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 4 A friction stir welding device includes two workpieces 2 mounted on a welding table 1. One end of the weld seam of the two workpieces 2 is provided with a compensation block 3, which simultaneously abuts against the ends of the weld seam of the two workpieces 2. The end of the compensation block 3 away from the two workpieces 2 is connected to an installation mechanism 4, which is connected to the two workpieces 2.

[0023] like Figures 1 to 4 As shown, the main improvement of this utility model lies in improving the integrity of the workpiece 2 in friction stir welding, improving the quality of the welded product, and improving the welding effect, such as... Figures 1 to 4 As shown, in the present invention, when using the friction stir welding device, two workpieces 2 to be welded and fixed are first fixed together on the welding table 1. Then, the installation mechanism 4 is used to install and fix the compensation block 3 at the end of the welding position of the two workpieces 2. When the stirring head of the friction stir welding device starts welding from the welding start point of the two workpieces 2 and moves to the end, the stirring head moves from the welding end of the two workpieces 2 to the compensation block 3, thereby welding the compensation block 3 to the two workpieces 2 together, and causing the stirring head to move out from the inside of the compensation block 3, leaving the finishing pit inside the compensation block 3. Then, the excess compensation block 3 protruding from the outside of the two workpieces 2 is cut off with a cutting tool, and the cut end is ground flat with a grinding tool to obtain a complete welded workpiece 2, improving the integrity of the welded workpiece 2 and improving the quality of the welded product. It should be noted that the material of the compensation block 3 must be the same as that of at least one of the workpieces 2 to ensure the stability of the material properties at the welding position, and the contact position between the compensation block 3 and the two workpieces 2 should be as close as possible to the two workpieces 2 to improve the stability of the friction stir welding operation.

[0024] like Figure 1 and Figure 2As shown, the installation mechanism 4 includes a clamping assembly 5, a connecting assembly 6, and an adjusting assembly 7. The clamping assembly 5 is used to clamp and fix the compensation block 3. The connecting assembly 6 is connected to the weld ends of the two workpieces 2. The adjusting assembly 7 is used to adjust the distance between the clamping assembly 5 and the connecting assembly 6, and to press the compensation block 3 against the weld ends of the two workpieces 2. During installation, the compensation block 3 is first clamped and fixed in the clamping assembly 5. Then, the connecting assembly 6 is used to connect and fix it to the two fixed workpieces 2. Finally, the adjusting assembly 7 is used to adjust the clamping assembly 5 holding the compensation block 3, so that the compensation block 3 is pressed tightly against the weld ends of the two workpieces 2. This allows the stirring head to move smoothly from the weld position of the two workpieces 2 to the compensation block 3 during friction welding, and to weld the compensation block 3 to the two workpieces 2 together. It should be noted that after the compensation block 3 is clamped and fixed in the clamping assembly 5, it is necessary to ensure that the part of the compensation block 3 protruding outward can contact the two workpieces 2.

[0025] like Figures 2 to 4 As shown, the clamping assembly 5 includes a U-shaped clamp 51 and a threaded clamp 52. The end of the compensation block 3 furthest from the weld between the two workpieces 2 is located inside the U-shaped clamp 51. The threaded clamp 52 passes through the side wall of one end of the U-shaped clamp 51 and abuts against the compensation block 3. The threaded clamp 52 is threadedly connected to the U-shaped clamp 51. The compensation block 3 is placed inside the U-shaped clamp 51, and then the threaded clamp 52 is turned, causing the threaded clamp 52 to gradually move into the U-shaped clamp 51 and press the compensation block 3 against the inner side of the U-shaped clamp 51, thus completing the clamping and fixing operation of the compensation block 3.

[0026] like Figure 3 and Figure 4 As shown, a clamping plate 53 is fixedly connected to one end of the threaded clamping rod 52 near the compensation block 3. The side of the clamping plate 53 away from the threaded clamping rod 52 abuts against one side of the compensation block 3, and the other side of the compensation block 3 abuts against the inner wall of the other end of the U-shaped clamp 51. When the threaded clamping rod 52 presses against the compensation block 3, the clamping plate 53 contacts and presses against the compensation block 3, increasing the pressing contact area and improving the firmness and stability of the clamping and fixing of the compensation block 3.

[0027] like Figures 2 to 4 As shown, a first hand-tightening cap 54 is fixedly connected to the end of the threaded clamp 52 away from the compensation block 3. By hand-tightening the first hand-tightening cap 54, it is easier to rotate the threaded clamp 52, thus improving the ease of operation in clamping the compensation block 3.

[0028] like Figures 2 to 4As shown, the connecting assembly 6 includes a U-shaped connecting frame 61 and two connecting blocks 62. The two connecting blocks 62 are fixedly connected to both ends of the U-shaped connecting frame 61, and the sides of the two connecting blocks 62 away from the U-shaped connecting frame 61 are fixedly connected to the two workpieces 2 by adhesive. The adjusting assembly 7 passes through the side of the U-shaped connecting frame 61 away from the workpiece 2 and connects to the U-shaped clamp 51. During installation, apply strong adhesive or double-sided tape to the end faces of the two connecting blocks 62, then align the compensation block 3 in the clamping assembly 5 with the weld seam of the two workpieces 2, and simultaneously connect and fix the two connecting blocks 62 to the two workpieces 2 by adhesive. Then, the adjusting assembly 7 presses the compensation block 3 into the weld seam of the two workpieces 2.

[0029] like Figures 2 to 4 As shown, the adjustment assembly 7 includes an adjustment screw 71 and a T-shaped rotating block 72. A T-shaped rotating groove 501 is provided on the side of the U-shaped clamp 51 away from the compensation block 3. The T-shaped rotating block 72 is rotatably connected to the T-shaped rotating groove 501. The thinner end of the T-shaped rotating block 72 passes through the T-shaped rotating groove 501 and is fixedly connected to the adjustment screw 71. The other end of the adjustment screw 71 passes through the U-shaped connecting frame 61 and is threadedly connected to the U-shaped connecting frame 61. After the connecting component 6 is connected and fixed to the two workpieces 2, the adjusting screw 71 is rotated on the U-shaped connecting frame 61, which drives the U-shaped clamp 51 to gradually approach the two workpieces 2. This allows the compensation block 3 to be gradually pressed against the weld seam of the two workpieces 2. During the rotation of the adjusting screw 71, the U-shaped clamp 51 can be held by hand. By rotating the T-shaped rotating block 72 in the T-shaped rotating groove 501, the U-shaped clamp 51 is pushed towards the workpiece 2, ensuring that the upper surface of the compensation block 3 is flush with the upper surface of the two workpieces 2. This allows the stirring head to move smoothly from the weld seam of the two workpieces 2 into the compensation block 3 during welding, thus completing the pitless welding of the workpiece 2.

[0030] like Figures 2 to 4 As shown, a second hand-tightening cap 73 is fixedly connected to the end of the adjusting screw 71 away from the U-shaped clamp 51. By manually tightening the second hand-tightening cap 73, it is easier to rotate the adjusting screw 71, thus improving the convenience of the adjustment operation.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A friction stir welding apparatus, comprising two workpieces (2) mounted on a welding table (1), characterized in that: One end of the weld seam of the two workpieces (2) is provided with a compensation block (3), which abuts against the ends of the weld seam of the two workpieces (2) at the same time. The end of the compensation block (3) away from the two workpieces (2) is connected to an installation mechanism (4), which is connected to the two workpieces (2).

2. The friction stir welding apparatus according to claim 1, characterized in that: The installation mechanism (4) includes a clamping component (5), a connecting component (6) and an adjusting component (7). The clamping component (5) is used to clamp and fix the compensation block (3). The connecting component (6) is connected to the weld ends of the two workpieces (2). The adjusting component (7) is used to adjust the distance between the clamping component (5) and the connecting component (6) on the connecting component (6) and to press the compensation block (3) against the weld ends of the two workpieces (2).

3. The friction stir welding apparatus according to claim 2, characterized in that: The clamping assembly (5) includes a U-shaped clamp (51) and a threaded clamp (52). The end of the compensation block (3) away from the weld of the two workpieces (2) is located inside the U-shaped clamp (51). The threaded clamp (52) passes through the side wall of one end of the U-shaped clamp (51) and abuts against the compensation block (3). The threaded clamp (52) is threadedly connected to the U-shaped clamp (51).

4. The friction stir welding apparatus according to claim 3, characterized in that: The threaded clamp (52) is fixedly connected to a clamping plate (53) at one end near the compensation block (3). The side of the clamping plate (53) away from the threaded clamp (52) abuts against one side of the compensation block (3), and the other side of the compensation block (3) abuts against the inner wall of the other end of the U-shaped clamp (51).

5. A friction stir welding apparatus according to claim 3 or 4, characterized in that: The threaded clamp (52) is fixedly connected to a first hand-tightening cap (54) at the end away from the compensation block (3).

6. A friction stir welding apparatus according to claim 3 or 4, characterized in that: The connecting component (6) includes a U-shaped connecting frame (61) and two connecting blocks (62). The two connecting blocks (62) are fixedly connected to both ends of the U-shaped connecting frame (61). The two connecting blocks (62) are fixedly connected to the two workpieces (2) respectively by adhesive on the side away from the U-shaped connecting frame (61). The adjusting component (7) passes through the side of the U-shaped connecting frame (61) away from the workpiece (2) and is connected to the U-shaped clamp (51).

7. The friction stir welding apparatus according to claim 6, characterized in that: The adjustment assembly (7) includes an adjustment screw (71) and a T-shaped rotating block (72). A T-shaped rotating groove (501) is provided on the side of the U-shaped clamp (51) away from the compensation block (3). The T-shaped rotating block (72) is rotatably connected to the T-shaped rotating groove (501). The thinner end of the T-shaped rotating block (72) passes through the T-shaped rotating groove (501) and is fixedly connected to the adjustment screw (71). The other end of the adjustment screw (71) passes through the U-shaped connecting frame (61) and is threadedly connected to the U-shaped connecting frame (61).

8. The friction stir welding apparatus according to claim 7, characterized in that: The end of the adjusting screw (71) away from the U-shaped clamp (51) is fixedly connected to a second hand-tightening cap (73).

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