Friction stir welding auxiliary device

Abstract

The utility model discloses a friction stir welding auxiliary device which comprises a bottom plate, four vertical supporting legs installed on the bottom plate, four cross beams sequentially connected with the tops of the vertical supporting legs, four first connecting pieces installed on the lower portions of the supporting legs, four second connecting pieces installed on the upper portions of the supporting legs and four third connecting pieces installed on the side portions of the cross beams. The two first pressing plates are connected with the first connecting piece, the two second pressing plates are connected with the second connecting piece, and the two third pressing plates are connected with the third connecting piece. The device is simple in structure, friction stir welding positioning of special welding parts and size control in the welding process can be achieved, particularly, a single person can be assisted in conveniently and rapidly operating and positioning under the condition that no testing fixture, measuring tool or auxiliary line exists, and meanwhile it is guaranteed that the size is qualified.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, and more specifically, particularly to a friction stir welding auxiliary device. Background Art

[0002] Friction stir welding is widely applicable to various materials. It is an important welding method for welding low-melting-point metals and alloys such as aluminum and magnesium, copper alloys, titanium alloys, steel materials, metal-based composite materials, and dissimilar metals (aluminum / copper, aluminum / magnesium, aluminum / steel, etc.).

[0003] The high-speed rotating stirring head penetrates into the workpiece to be welded, the rotating stirring needle rubs against the material to be welded and plasticizes it, the friction between the shaft shoulder and the workpiece surface generates heat and is used to prevent the plastic material from overflowing. During the welding process, the workpiece must be rigidly fixed on the back plate, the stirring head rotates at high speed and moves relative to the workpiece along the joint of the workpiece, and the weld is formed under the forging pressure of the stirring head, and finally the metallurgical bonding of the workpiece is achieved.

[0004] Some specially designed weldments, such as cabinets with arc structures, such as the CR450 aluminum alloy brake cabinet for rail transit, require stir friction welding for welding at key locations with arc plates. However, since the weldment itself has an arc plate structure, it is difficult to control the welding depth and shrinkage deformation when it is directly placed on the welding base plate for welding. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a friction stir welding auxiliary device, which is suitable for friction stir welding operations of welded parts with arc-shaped concave plates. It has a simple structure and can achieve friction stir welding positioning of special welded parts and dimensional control of the welding process.

[0006] The technical solution provided by the utility model is as follows:

[0007] A friction stir welding auxiliary device,

[0008] Including base plate,

[0009] 4 vertical legs mounted on the base plate,

[0010] 4 beams connected in sequence to the top of the vertical legs,

[0011] Four first connecting members installed at the lower part of the supporting legs,

[0012] Four second connecting members installed on the upper part of the supporting legs,

[0013] Four third connecting members installed on the side of the beam,

[0014] two first pressing plates connected to the first connecting member,

[0015] two second pressing plates connected to the second connecting member, and

[0016] Two third pressure plates connected to the third connecting member.

[0017] Wherein, it also includes a first pad installed on the outside of the supporting leg.

[0018] Wherein, a trapezoidal second cushion block is also provided on the crossbeam.

[0019] The first connecting member is provided with a screw hole, and the first pressing plate presses the welding member onto the friction stir welding auxiliary device and is connected to the first connecting member by bolts.

[0020] The second connecting member is provided with a screw hole, and the second pressing plate presses the weldment onto the friction stir welding auxiliary device and is connected to the second connecting member by bolts.

[0021] The third connecting member is provided with a screw hole, and the third pressing plate presses the weldment onto the friction stir welding auxiliary device and is connected to the third connecting member by bolts.

[0022] Wherein, the bottom of the supporting leg is welded to the bottom plate.

[0023] Wherein, the cross beam is welded to the top of the supporting leg.

[0024] Wherein, the bottom plate is clamped on the welding base.

[0025] Compared with the prior art, the friction stir welding auxiliary device provided by the utility model includes a base plate, 4 vertical legs installed on the base plate, 4 crossbeams connected to the tops of the vertical legs in sequence, 4 first connectors installed at the bottom of the legs, 4 second connectors installed at the top of the legs, 4 third connectors installed at the sides of the crossbeams, 2 first pressure plates connected to the first connectors, 2 second pressure plates connected to the second connectors, and 2 third pressure plates connected to the third connectors. The utility model has a simple structure and can realize the friction stir welding positioning of special welded parts and the dimensional control of the welding process, especially it can assist a single person to conveniently and quickly operate the positioning without a check fixture, a measuring tool, or an auxiliary line, while ensuring the size is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a friction stir welding auxiliary device of the utility model;

[0028] Figure 2 It is a front view of the friction stir welding auxiliary device of the utility model;

[0029] Figure 3 It is a side view of the friction stir welding auxiliary device of the utility model;

[0030] Figure 4 It is a top view of the friction stir welding auxiliary device of the utility model;

[0031] Figure 5 It is a structural schematic diagram of a welded part;

[0032] In the figure, a base plate 100, a leg 200, a cross beam 300, a first connecting member 410, a second connecting member 420, a third connecting member 430, a first pressing plate 510, a second pressing plate 520, a third pressing plate 530, a first cushion block 610, a second cushion block 620, a welded member 710 with an arc-shaped concave plate material, and a flat plate welded member 720. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present utility model can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the present utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0038] The embodiments of the present invention are written in a progressive manner.

[0039] like Figures 1 to 5 As shown, a friction stir welding auxiliary device includes a base plate 100, four vertical legs 200 installed on the base plate 100, four cross beams 300 connected in sequence to the tops of the vertical legs 200, four first connecting members 410 installed at the lower part of the legs 200, four second connecting members 420 installed at the upper part of the legs 200, four third connecting members 430 installed at the sides of the cross beam 300, two first pressing plates 510 connected to the first connecting members 410, two second pressing plates 520 connected to the second connecting members 420, and two third pressing plates 530 connected to the third connecting members 430.

[0040] The friction stir welding auxiliary device of the utility model is suitable for the friction stir welding operation of two welding pieces 710 with arc-shaped concave plates and a flat welding piece 720. The two welding pieces 710 with arc-shaped concave plates are respectively welded on both sides of the flat welding piece 720. Due to the special shape of the welding piece 710 with the arc-shaped concave plate, it is not easy to fix it by ordinary limiting methods and it is easy to deform. The friction stir welding auxiliary device of the utility model is installed on the welding base to fix the welding piece 710 with the arc-shaped concave plate on the side. 0 and a flat plate, the tops of the four legs 200 of the friction stir welding auxiliary device are connected in sequence through the cross beams 300 to form a hexagonal frame, the concave surface of the welded piece 710 with the arc-shaped concave plate is facing one of the cross beams 300, the welding side of the welded piece 710 with the arc-shaped concave plate is placed on the cross beam 300 and compacted by the third pressing plate 530, and then the third pressing plate 530 is fixedly connected to the third connecting member 430, and the non-welding side of the welded piece 710 with the arc-shaped concave plate is connected by the second pressing plate 520 and the first pressing plate 5 10, and then the second pressing plate 520 is fixedly connected to the second connecting member 420, the first pressing plate 510 is fixedly connected to the first connecting member 410, the first pressing plate 510, the second pressing plate 520 and the third pressing plate 530 are respectively fixedly connected to the first connecting member 410, the second connecting member 420 and the third connecting member 430. The welding piece 710 with the arc-shaped concave plate material is fixed to the stir friction welding auxiliary device, and then one side welding surface of the flat welding piece 720 is closely contacted with the welding side of the welding piece 710 with the arc-shaped concave plate material, and then the other side is fixedly connected to the welding piece 710 with the arc-shaped concave plate material. The welding side of the welded part 710 with the arc-shaped concave plate material is in close contact with the welding surface of the other side of the flat welded part 720, and at the same time, another third pressing plate 530 is compacted and then fixed on the third connecting member 430, which is consistent with the fixing method of the first piece with the arc-shaped concave plate material. The first pressing plate 510, the second pressing plate 520 and the third pressing plate 530 of the other piece are respectively fixedly connected with the first connecting member 410, the second connecting member 420 and the third connecting member 430 to fix the welded part 710 with the arc-shaped concave plate material on the friction stir welding auxiliary device. At this time, the position fixation of the two welded parts 710 with the arc-shaped concave plate materials and the flat welded part 720 is completed, which is convenient for friction stir welding. The use of the friction stir welding auxiliary device of the utility model to fix the welded parts can realize the friction stir welding positioning of special welded parts and the size control of the welding process, especially it can assist a single person to conveniently and quickly operate the positioning without a check fixture, a measuring tool, and an auxiliary line, while ensuring the size is qualified.

[0041] The friction stir welding auxiliary device of the present invention also includes a first pad 610 installed on the outside of the support leg 200. Since the connection between the welding side and the non-welding side of the welded part 710 with the arc-shaped concave plate is a concave design, when the welding side of the welded part 710 with the arc-shaped concave plate is in contact with the top of the beam 300, the non-welding side of the welded part 710 with the arc-shaped concave plate is still a certain distance from the support leg 200. At this time, the first pad 610 abuts between the non-welding side of the welded part 710 with the arc-shaped concave plate and the support leg 200, so that the welded part 710 with the arc-shaped concave plate can be more stably fixed on the friction stir welding auxiliary device.

[0042] The cross beam 300 of the friction stir welding auxiliary device of the present invention is also provided with a trapezoidal second pad 620. Since the connection between the welding side and the non-welding side of the welded part 710 with an arc-shaped concave plate is a concave design, there will be a certain gap on the contact surface of the cross beam 300 at the concave connection. At this time, the second trapezoidal pad 620 can better support the welded part 710 with an arc-shaped concave plate, so that the welded part 710 with an arc-shaped concave plate can be more stably fixed on the friction stir welding auxiliary device.

[0043] As an optional implementation, the first connecting member 410 of the present invention is provided with a screw hole, and the first pressing plate 510 presses the weldment onto the friction stir welding auxiliary device and is connected to the first connecting member 410 by bolts.

[0044] The second connecting member 420 is provided with a screw hole, and the second pressing plate 520 presses the weldment onto the friction stir welding auxiliary device and is installed and connected to the second connecting member 420 via bolts.

[0045] The third connecting member 430 is provided with a screw hole, and the third pressing plate 530 presses the weldment onto the friction stir welding auxiliary device and is installed and connected to the third connecting member 430 by bolts.

[0046] During operation, the weldment is first pressed onto the crossbeam 300 of the friction stir welding auxiliary device, and then the third pressing plate 530 is pressed onto the surface of the weldment, and then the third pressing plate 530 is fixedly connected to the third connecting member 430 by bolts, and at the same time, the second pressing plate 520 and the first pressing plate 510 are pressed onto the surface of the weldment, and then the second pressing plate 520 is fixedly connected to the second connecting member 420 by bolts, and the first pressing plate 510 is fixedly connected to the first connecting member 410, so that the weldment can be fixed on the friction stir welding auxiliary device.

[0047] As an optional implementation, the bottom of the support leg 200 of the present invention is welded to the base plate 100, and can also be fixed to the base plate 100 in other ways.

[0048] As an optional implementation, the crossbeam 300 of the present invention is welded to the supporting leg 200, and can also be fixed to the top of the supporting leg 200 in other ways.

[0049] As an optional implementation, the base plate 100 of the present invention is clamped on the welding base, and can also be fixed on the welding base in other detachable ways.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A friction stir welding auxiliary device, characterized in that: comprising a bottom plate (100), Four vertical legs (200) mounted on the base plate (100), 4 cross beams (300) connected in sequence to the tops of the vertical legs (200), Four first connecting members (410) installed at the lower part of the supporting leg (200), Four second connecting members (420) installed on the upper part of the supporting leg (200), Four third connecting members (430) installed on the side of the crossbeam (300), two first pressing plates (510) connected to the first connecting member (410), two second pressing plates (520) connected to the second connecting member (420), and Two third pressing plates (530) connected to the third connecting member (430).

2. The friction stir welding auxiliary device according to claim 1, characterized in that: It also includes a first cushion block (610) installed on the outside of the supporting leg (200).

3. The friction stir welding auxiliary device according to claim 2, characterized in that: A trapezoidal second cushion block (620) is also provided on the crossbeam (300).

4. The friction stir welding auxiliary device according to claim 3, characterized in that: The first connecting member (410) is provided with a screw hole, and the first pressing plate (510) presses the weldment onto the friction stir welding auxiliary device and is installed and connected to the first connecting member (410) via bolts.

5. The friction stir welding auxiliary device according to claim 4, characterized in that: The second connecting member (420) is provided with a screw hole, and the second pressing plate (520) presses the weldment onto the friction stir welding auxiliary device and is connected to the second connecting member (420) via bolts.

6. The friction stir welding auxiliary device according to claim 5, characterized in that: The third connecting member (430) is provided with a screw hole, and the third pressing plate (530) presses the weldment onto the friction stir welding auxiliary device and is connected to the third connecting member (430) via bolts.

7. The friction stir welding auxiliary device according to claim 1, characterized in that: The bottom of the supporting leg (200) is welded to the bottom plate (100).

8. The friction stir welding auxiliary device according to claim 1, characterized in that: The crossbeam (300) is welded to the top of the supporting leg (200).

9. The friction stir welding auxiliary device according to claim 1, characterized in that: The bottom plate (100) is clamped on the welding base.

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