Friction stir welding jig for three-plate spliced aluminum alloy sections

Abstract

The utility model provides a three-plate spliced aluminum alloy section friction stir welding jig which comprises a panel, the middle of the panel is arranged to be a datum plane, the two sides of the panel are arranged to be pre-deformation planes, a fixed supporting seat is installed at the bottom of the panel, a base is arranged below the panel, and the base is arranged on the base. The top of the base is fixedly connected with a plurality of supporting blocks at equal intervals, the multiple supporting blocks are all located below the panel, the side wall, close to the fixed supporting base, of one supporting block is fixedly connected with a rotating shaft, and the end, away from the supporting block, of the rotating shaft is rotationally clamped into the open hole of the fixed supporting base. Through the design of the pre-deformation plane, the jig can adjust the position of a workpiece in advance before welding so as to compensate deformation possibly generated in the welding process. By means of the design, it is ensured that the flatness of the welded workpiece is well kept, the problem that the welded workpiece is not flat is effectively solved, and the welding precision and the overall quality are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding jigs, in particular to a friction stir welding jig for three-plate spliced aluminum alloy profiles. Background Technique

[0002] In the current manufacturing process of aluminum alloy profile battery energy storage boxes, since the volume of aluminum alloy profile battery energy storage boxes is generally large, on the basis of meeting strength and performance requirements, the weight of the body is required to be light, so that the box body develops in the direction of thinness. During the welding process, the deformation caused by welding pressure is getting larger and larger. It is necessary to use subsequent correction processes to complete the shaping tooling of the workpiece. The process is cumbersome and the correction is difficult. To solve the problem of poor battery heat dissipation caused by poor flatness of the workpiece bottom plate, improve welding efficiency, improve weld quality and welding flatness, it is particularly important to develop a high-efficiency, high-quality and economically applicable tooling. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a friction stir welding jig for three-plate spliced aluminum alloy profiles.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A friction stir welding jig for three-plate spliced aluminum alloy profiles, including a panel. The middle part of the panel is set as a reference plane, and the two sides are set as pre-deformation planes. A fixed support seat is installed at the bottom of the panel. A base is arranged below the panel. A plurality of support blocks are equidistantly and fixedly connected to the top of the base. All the plurality of support blocks are located below the panel. A rotary shaft is fixedly connected to the side wall of one of the support blocks close to the fixed support seat. The end of the rotary shaft away from the support block is rotatably clamped inside the opening of the fixed support seat. Two groups of clamping corner oil cylinders are installed at the bottoms of both sides of the panel. All the plurality of support blocks are located between the two groups of clamping corner oil cylinders. A plurality of top support oil cylinders are fixedly connected to the top of the base. The plurality of top support oil cylinders are respectively located on one side of the plurality of support blocks. The movable ends of the plurality of top support oil cylinders are all fixedly connected with pin shafts. A plurality of support connection seats are equidistantly and fixedly connected to the bottom of the panel. The plurality of support connection seats are respectively connected with the plurality of pin shafts. A plurality of positioning pins are installed at the tops of both sides of the panel. The plurality of positioning pins are respectively installed at the movable ends of the plurality of clamping corner oil cylinders.

[0005] Preferably, the number of the plurality of clamping corner oil cylinders and positioning pins is 8, the number of the plurality of support blocks is 3, and the number of the plurality of top support oil cylinders and support connection seats is 6.

[0006] Preferably, the clamping corner oil cylinders and the top support oil cylinders are both connected to a hydraulic pump through pipelines.

[0007] Preferably, a plurality of the support connection seats are symmetrically arranged at the bottom of the pre-deformation planes on both sides of the panel.

[0008] The utility model has the following beneficial effects:

[0009] 1. For the friction stir welding fixture of the three-plate splicing aluminum alloy profile, through the design of the pre-deformation plane, the fixture can pre-adjust the position of the workpiece before welding to compensate for the possible deformation during the welding process. This design ensures that the flatness of the workpiece is well maintained after welding, effectively avoiding the problem of unevenness of the workpiece after welding, and significantly improving the welding precision and overall quality. The setting of the pre-deformation amount not only maintains the flatness but also reserves enough gaps between the welds, promoting the plastic flow of materials during the friction stir welding process. This flow helps to eliminate defects such as pores and welding tunnels generated during the welding process, thereby improving the welding quality and connection strength of the welds and making the performance of the welded joints more excellent.

[0010] 2. For the friction stir welding fixture of the three-plate splicing aluminum alloy profile, the design of the rotating shaft and the rotary support seat enables the panel to swing up and down, providing greater processing flexibility for workpieces of different shapes and sizes. This design allows the operator to adjust the angle of the panel according to the actual situation of the workpiece to meet different welding requirements, thus broadening the application range of the fixture.

[0011] 3. For the friction stir welding fixture of the three-plate splicing aluminum alloy profile, the automatic control of the clamping corner oil cylinder and the top support oil cylinder makes the clamping, positioning, and welding processes of the workpiece faster and more accurate. This automatic control reduces the need for manual intervention, lowers the labor intensity, and improves the production efficiency. At the same time, the automatic control also reduces the possibility of human errors and ensures the consistency and stability of the welding process. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Wherein, 1, panel; 2, fixed support seat; 3, base; 4, support block; 5, rotating shaft; 6, clamping corner oil cylinder; 7, support connection seat; 8, top support oil cylinder; 9, pin shaft; 10, positioning pin. Detailed Embodiment

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0015] As shown Figure 1 in the figure, the embodiment of the utility model provides a friction stir welding fixture for three - plate spliced aluminum alloy profiles, which includes a panel 1. The middle part of the panel 1 is set as a reference plane, and the two sides are set as pre - deformation planes. A fixed support base 2 is installed at the bottom of the panel 1. A base 3 is arranged below the panel 1. The top of the base 3 is fixedly connected with a plurality of support blocks 4 at equal intervals. All the plurality of support blocks 4 are located below the panel 1. The side wall of one of the support blocks 4 close to the fixed support base 2 is fixedly connected with a rotary shaft 5. The end of the rotary shaft 5 away from the support block 4 is rotationally clamped inside the opening of the fixed support base 2. Two groups of clamping corner oil cylinders 6 are installed at the bottom of both sides of the panel 1. All the plurality of support blocks 4 are located between the two groups of clamping corner oil cylinders 6. The top of the base 3 is fixedly connected with a plurality of top - support oil cylinders 8. The plurality of top - support oil cylinders 8 are respectively located on one side of the plurality of support blocks 4. The movable ends of the plurality of top - support oil cylinders 8 are all fixedly connected with pin shafts 9. The bottom of the panel 1 is fixedly connected with a plurality of support connection seats 7 at equal intervals. The plurality of support connection seats 7 are respectively connected with the plurality of pin shafts 9. A plurality of positioning pins 10 are installed at the top of both sides of the panel 1. The plurality of positioning pins 10 are respectively installed at the movable ends of the plurality of clamping corner oil cylinders 6.

[0016] Increasing the number of the clamping corner oil cylinders 6 and the positioning pins 10 can ensure that the workpiece is more evenly and stably clamped and positioned during the welding process, reducing welding quality problems caused by insufficient clamping force or inaccurate positioning.

[0017] An appropriate distribution of the support blocks 4 can provide sufficient support force, while avoiding an overly complex design that increases manufacturing costs and assembly difficulties. Three support blocks 4 are distributed at the key stress points of the panel 1 to optimize its structural strength and stability.

[0018] Increasing the number of the top - support oil cylinders 8 and the support connection seats 7 can achieve more precise and stable control of the panel 1. These top - support oil cylinders 8 and support connection seats 7 are distributed between the panel 1 and the base 3. By working together, they can accurately adjust the position and angle of the panel 1 to meet the welding requirements of different workpieces.

[0019] By connecting the clamping corner oil cylinders 6 and the top - support oil cylinders 8 to the hydraulic pump through pipelines, centralized supply and precise control of hydraulic power can be achieved. This design simplifies the layout of the hydraulic system, improves energy utilization efficiency, and ensures the quick response and stable output of the oil cylinders during the welding process.

[0020] Symmetrically arranging a plurality of support connection seats 7 at the bottom of the pre - deformation planes on both sides of the panel 1 can ensure that the panel 1 remains balanced and stable when stressed. This symmetrical design also helps to reduce deformation and stress concentration problems caused by uneven stress, improving the overall durability and service life of the fixture.

[0021] Working principle: When using the friction stir welding fixture for three-plate spliced aluminum alloy profiles, first, accurately place the aluminum alloy profiles to be welded on the panel 1 of the fixture, which is the basis for ensuring welding accuracy. Subsequently, use the positioning pin 10 and the clamping corner oil cylinder 6 to firmly fix and accurately position the workpiece to prevent movement or deviation during the welding process. Drive the jacking oil cylinder 8 to work through the hydraulic pump, and adjust the pre-deformed plane of the panel 1 to a predetermined angle and position. This step is to compensate for the deformation that may occur during the welding process and ensure the flatness and smoothness of the workpiece after welding. At the same time, it also provides the best welding position and angle for subsequent welding operations. Start the friction stir welding equipment, make the welding tool rotate at high speed and insert it into the weld seam. During the friction process between the welding tool and the weld seam material, a large amount of frictional heat is generated, softening the weld seam material and causing plastic flow. Under the action of the stirring head, these softened materials are fully mixed and extruded, finally forming a dense weld seam. This step is the core of the welding process and is directly related to the quality and strength of the weld seam. After the welding is completed, turn off the welding equipment, and release the clamping corner oil cylinder 6 and the jacking oil cylinder 8 to make the panel 1 return to its initial state. At this time, the welded aluminum alloy profiles can be safely removed. Throughout the process, the pre-deformation design of the fixture and the precise control of the oil cylinder play a crucial role, jointly ensuring the welding accuracy and quality.

[0022] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A friction stir welding jig for three-plate spliced ​​aluminum alloy profiles, comprising a panel (1), characterized in that: The middle of the panel (1) is set as a reference plane, and the two sides are set as pre-deformation planes. A fixed support seat (2) is installed at the bottom of the panel (1). A base (3) is arranged below the panel (1). A plurality of support blocks (4) are fixedly connected to the top of the base (3) at equal intervals. The plurality of support blocks (4) are all located below the panel (1). One of the support blocks (4) is fixedly connected to a rotating shaft (5) near the side wall of the fixed support seat (2). One end of the rotating shaft (5) away from the support block (4) is rotatably clamped in the opening of the fixed support seat (2). Two sets of clamping angle oil cylinders (6) are installed at the bottom of both sides of the panel (1). The plurality of support blocks (4) are all located between two groups of clamping angle cylinders (6); the top of the base (3) is fixedly connected with a plurality of top support cylinders (8); the plurality of top support cylinders (8) are respectively located on one side of the plurality of support blocks (4); the movable ends of the plurality of top support cylinders (8) are all fixedly connected with pin shafts (9); the bottom of the panel (1) is evenly fixedly connected with a plurality of support connection seats (7); the plurality of support connection seats (7) are respectively connected to a plurality of pin shafts (9); the tops of both sides of the panel (1) are installed with a plurality of positioning pins (10); the plurality of positioning pins (10) are respectively installed on the movable ends of the plurality of clamping angle cylinders (6).

2. The friction stir welding jig for three-plate spliced ​​aluminum alloy profiles according to claim 1, characterized in that: The number of the plurality of clamping angle cylinders (6) and the positioning pins (10) is 8, the number of the plurality of support blocks (4) is 3, and the number of the plurality of supporting cylinders (8) and the supporting connection seats (7) is 6.

3. The friction stir welding jig for three-plate spliced ​​aluminum alloy profiles according to claim 1, characterized in that: The clamping angle oil cylinder (6) and the supporting oil cylinder (8) are both connected to a hydraulic pump via pipelines.

4. The friction stir welding welding jig for three-plate spliced ​​aluminum alloy profiles according to claim 1, characterized in that: The plurality of support connection seats (7) are symmetrically arranged at the bottom of the pre-deformed planes on both sides of the panel (1).

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