Friction stir joining device

Abstract

To provide a friction stir joining device capable of continuously joining along a predetermined trajectory.SOLUTION: A friction stir joining device 10 joins workpieces by friction using a rotating tool 12. The friction stir joining device 10 includes guide rollers 14, 14'. The guide rollers roll in a state of being in contact with guide rails 21, 21' which extend in the feed direction of the friction stir joining device. Consequently, the friction stir joining device moves along the workpiece in a state where the friction stir joining device is pressed against the workpiece direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a friction stir welding apparatus including a guide rail. [Background technology]

[0002] Friction stir welding is known as one of the joining techniques, in which frictional heat is used to reduce the deformation resistance of the materials to be joined, and then the materials are stirred (plastic flowed) to join them. The following system has been disclosed as a system for performing friction stir welding by pressing a rotating tool against the materials to be joined.

[0003] For example, Patent Document 1 discloses a spot joining system in which the tip of a rotating joining tool is pressed against the workpieces to spot join the workpieces by friction stir welding, the spot joining system being characterized by having a holding device for holding the workpieces, a moving device for moving the joining tool to an arbitrary position on one side of the workpieces, a fixing device connected to the joining tool and temporarily fixed to the workpieces during joining to prevent the joining tool from shaking during joining, and a control device for controlling the moving device, moving the joining tool to the joining position, and pressing the rotating joining tool against the workpieces to spot join them while the fixing device is temporarily fixed to the workpieces. According to the spot joining system of Patent Document 1, since the fixing device connected to the joining tool is temporarily fixed to the workpieces during joining, it is possible to prevent the joining tool from shaking sideways and perform spot joining reliably. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-205374 A Summary of the Invention [Problem to be solved by the invention]

[0005] When performing continuous joining rather than spot joining, the rotating tool and the workpieces cannot be fixed in place, so the reaction force from the workpieces can cause the rotating tool to shift, resulting in a shift in the joining position.

[0006] Therefore, an object of the present disclosure is to provide a friction stir welding apparatus capable of continuous welding in a predetermined trajectory. [Means for solving the problem]

[0007] The present disclosure achieves the above object by the following means.

[0008] <1> A friction stir welding apparatus that frictionally welds workpieces with a rotating tool, The friction stir welding apparatus includes a guide roller, The guide rollers roll in contact with a guide rail extending in the feed direction of the friction stir welding device, thereby moving the friction stir welding device along the workpiece while pressing the friction stir welding device toward the workpiece. Friction stir welding equipment. Effect of the Invention

[0009] According to the friction stir welding apparatus of the present disclosure, friction stir welding can be performed in a predetermined trajectory in continuous welding. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram for explaining a friction stir welding apparatus including a guide roller according to the present disclosure. [Diagram 2] FIG. 2 is a schematic diagram for explaining a friction stir welding apparatus including a guide rail and a guide roller according to the present disclosure. [Diagram 3] FIG. 3 is a diagram for explaining a welded portion after friction stir welding by the friction stir welding apparatus of the present disclosure in Example 1 and Comparative Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present disclosure will be described in detail. Note that the present disclosure is not limited to the following embodiments, and various modifications can be made within the scope of the gist of the present disclosure.

[0012] 《Friction stir welding equipment》 The friction stir welding apparatus of the present disclosure is A friction stir welding apparatus that frictionally welds workpieces with a rotary tool, The friction stir welding apparatus includes a guide roller, The guide rollers roll in contact with a guide rail extending in the feed direction of the friction stir welding device, thereby pressing the friction stir welding device toward the workpieces and moving the friction stir welding device along the workpieces.

[0013] According to the friction stir welding apparatus of the present disclosure, friction stir welding can be performed in a predetermined trajectory in continuous welding.

[0014] Specifically, for example, as shown in Fig. 1 and Fig. 2, the friction stir welding apparatus of the present disclosure is provided with guide rollers 14, 14' near the mounting portion of the rotary tool. The guide rollers 14, 14' provided in the friction stir welding apparatus 10 roll in contact with guide rails 21, 21' extending in the feed direction of the friction stir welding apparatus, and the friction stir welding apparatus 10 is pressed toward the workpieces. With this structure, the reaction force from the workpieces is received by the guide rollers and the guide rails. Therefore, the rotary tool does not shift in position due to the reaction force from the workpieces, and the workpieces can be continuously welded in a predetermined trajectory.

[0015] <Configuration of Friction Stir Welding Apparatus> The friction stir welding apparatus of the present disclosure is a friction stir welding apparatus that frictionally welds workpieces with a rotary tool, and includes a guide roller.

[0016] FIG. 1 is a schematic diagram showing one embodiment of the friction stir welding apparatus of the present disclosure, but the present invention is not limited to this embodiment.

[0017] In the friction stir welding apparatus 10, a rotating tool 12 is provided on a rotating mechanism 11. The rotating tool 12 rotated at high speed by the rotating mechanism 11 is pressed against the workpieces to perform friction stir welding. Two guide roller support parts 13, 13' are provided on the sides of the rotating mechanism 11, and rotatable guide rollers 14, 14' are provided at the tips of the guide roller support parts 13, 13', respectively.

[0018] The guide roller support parts 13, 13' provided in the rotation mechanism 11 are not particularly limited, but may exist independently and may have any shape and size. The guide rollers 14, 14' are not particularly limited, but may exist independently and may have any shape and size. The positions of the guide rollers 14, 14' are not particularly limited, but are preferably arranged symmetrically with respect to the friction stir welding apparatus from the viewpoint of receiving a reaction force from the workpieces and moving the friction stir welding apparatus in a predetermined trajectory.

[0019] The material to be joined is not particularly limited, but examples thereof include aluminum alloys, magnesium alloys, titanium alloys, and steel materials.

[0020] <Guide rollers and guide rails> The guide rollers roll in contact with a guide rail extending in the feed direction of the friction stir welding device, thereby pressing the friction stir welding device toward the workpieces and moving the friction stir welding device along the workpieces.

[0021] FIG. 2 is a schematic diagram showing one embodiment of the friction stir welding apparatus according to the present disclosure in a state of contact with a guide rail, but the present invention is not limited to this embodiment.

[0022] The guide rails 21, 21' extend in the feed direction of the friction stir welding apparatus 10 and are fixed at an incline to, for example, supports 23, 23' provided on both sides of the table 22. The guide rollers 14, 14' are in contact with the guide rails 21, 21' and roll on the guide rails 21, 21'. This allows the friction stir welding apparatus 10 equipped with the guide rollers 14, 14' to move along the guide rails 21, 21'. Because the guide rails 21, 21' are inclined, the friction stir welding apparatus 10 is pressed against the workpieces.

[0023] The inclination of the guide rails 21, 21' is not particularly limited as long as it is possible to press the friction stir welding apparatus 10 toward the workpieces, and it is sufficient that the surfaces on which the guide rollers 14, 14' roll are inclined so as to face the workpieces.

[0024] The positions of the guide rollers 14, 14' and the guide rails 21, 21' are not particularly limited, but for example, when joining is performed with the rotating tool facing downward, the guide rollers 14, 14' may be positioned below the guide rails 21, 21', and when joining is performed with the rotating tool facing upward, the guide rollers 14, 14' may be positioned above the guide rails 21, 21'. With such an arrangement, the friction stir welding apparatus 10 can be pressed toward the materials to be joined, but this is not limited to this case.

[0025] Since the friction stir welding apparatus is pressed against the materials to be joined and then moved along the materials to be joined, the reaction force from the materials to be joined is received by the guide rollers 14, 14' and the guide rails 21, 21'. This makes it possible to prevent the rotating tool from shifting and enables friction stir welding to be performed along a specified trajectory.

[0026] 《Friction stir welding equipment》 Friction stir welding equipment is The friction stir welding apparatus, The above guide rail, and A table to which the guide rail is fixed.

[0027] FIG. 2 is a schematic diagram showing one embodiment of the friction stir welding equipment of the present disclosure, but the present disclosure is not limited to this embodiment.

[0028] The friction stir welding equipment includes a friction stir welding apparatus 10, a table 22, and guide rails 21, 21' fixed to two supports 23, 23' provided on both sides of the table 22. The guide rollers 14, 14' roll along the guide rails 21, 21' in contact with each other. The friction stir welding apparatus 10 including the guide rollers 14, 14' can also move along the guide rails 21, 21'. Because the guide rails 21, 21' are inclined, the friction stir welding apparatus 10 is pressed against the workpieces. Workpieces to be joined, for example a stack of two workpieces 24 and 25, are placed on the table 22.

[0029] The materials to be joined are not particularly limited, but may be a single layer or a laminate of two or more layers, or may be two materials to be joined butted together. The materials to be joined are not particularly limited, but may be fixed to the table 22, or may be fixed by a method such as hydraulic / pneumatic pressure, magnetic force, or vacuum suction.

[0030] The friction stir welding system may include other devices.

[0031] 《Friction stir welding method》 The friction stir welding method of the present disclosure includes: A friction stir welding method for joining workpieces by friction with a rotary tool, comprising the steps of: The above-mentioned friction stir welding method uses a guide roller, The guide roller rolls in contact with a guide rail extending in the feed direction of the friction stir welding, thereby pressing the rotating tool toward the workpieces and moving the rotating tool along the workpieces.

[0032] The friction stir welding method is not particularly limited, but may be, for example, friction stir welding by pressing a rotary tool 12 against workpieces 24 and 25 using friction stir welding equipment as shown in Fig. 2. As described above, since the guide rollers 14, 14' and guide rails 21, 21' are structured to receive the reaction force from the workpieces, the method disclosed herein allows friction stir welding to be performed continuously along a predetermined trajectory.

[0033] The rotary tool is not particularly limited, but the probe diameter and probe length can be designed arbitrarily according to the depth of the workpieces to be joined, etc. EXAMPLES

[0034] The present disclosure will be described in more detail with reference to the following examples, but the scope of the present disclosure is not limited to these examples.

[0035] Example 1 Aluminum A3003 (thickness 3.0 mm) and aluminum A6005C (thickness 4.0 mm) were overlapped, and a rotating tool was pressed against the surface of the aluminum A3003. Using a friction stir welding device equipped with a guide roller, linear friction stir welding was performed with the guide roller in contact with a guide rail extending in the feed direction of the friction stir welding device (welding speed 0.42 m / min, rotating tool rotation speed 2800 rpm). The rotating tool used had a shoulder diameter of φ12 mm, a probe diameter of φ4.0 mm, and a probe length of 4.3 mm.

[0036] Figure 3 shows the results of friction stir welding in Example 1. When a linear joining was performed over a joining distance of 210 mm, the deviation from the center was 0.2 mm, and the ratio of the deviation from the center to the joining distance was 0.1% (Figure 3(a)).

[0037] Comparative Example 1 Aluminum A3003 (thickness 3.0 mm) and aluminum A6005C (thickness 4.0 mm) were overlapped, and a rotating tool was pressed against the aluminum A3003 surface. A friction stir welding device without a guide roller was used to perform linear friction stir welding (welding speed 0.42 m / min, rotating tool rotation speed 2800 rpm). The rotating tool used had a shoulder diameter of φ12 mm, a probe diameter of φ4.0 mm, and a probe length of 4.3 mm.

[0038] Figure 3 shows the results of friction stir welding in Comparative Example 1. When a linear welding was performed over a welding distance of 140 mm, the deviation from the center was 1.0 mm, and the ratio of the deviation from the center to the welding distance was 0.7% (Figure 3(b)).

[0039] As in Example 1, when friction stir welding was performed using a friction stir welding apparatus equipped with the guide roller of the present disclosure, in which the guide roller rolls along a contacting guide rail, deviation from the center of the weld was kept small and a linear weld was achieved. On the other hand, as in Comparative Example 1, when friction stir welding was performed using a friction stir welding apparatus not equipped with a guide roller, the rotating tool received a reaction force from the workpieces, causing the position of the rotating tool to shift, resulting in a large deviation from the center of the weld.

[0040] Although preferred embodiments of the friction stir welding apparatus of the present disclosure have been described, those skilled in the art will recognize that modifications may be made without departing from the scope of the appended claims. [Explanation of symbols]

[0041] 10 Friction stir welding equipment 11 Rotation mechanism 12 Rotary tools 13, 13' Guide roller support 14, 14' guide roller 21, 21' guide rail 22 Tables 23, 23' post 24 Material to be joined 25 Material to be joined

Claims

[Claim 1] A friction stir welding apparatus that frictionally welds workpieces with a rotary tool, The friction stir welding apparatus includes a guide roller, The guide rollers roll in contact with a guide rail extending in a feed direction of the friction stir welding device, thereby moving the friction stir welding device along the workpieces while pressing the friction stir welding device toward the workpieces. Friction stir welding equipment.

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