An ultra-thin aluminum plate friction welding device

Abstract

This utility model provides an ultra-thin aluminum plate friction welding device, belonging to the field of friction stir welding technology. The ultra-thin aluminum plate friction welding device includes a welding machine connecting shaft head. Its features include: a friction welding drill rod is installed inside the welding machine connecting shaft head; a cleaning friction wheel is integrally formed at the bottom end of the friction welding drill rod; a friction stir welding head is integrally formed at the center point of the bottom surface of the cleaning friction wheel; an aluminum sheet pressing component is equipped on the outer wall of the friction welding drill rod; the surface of the aluminum sheet pressing component is in contact with the bottom end of the welding machine connecting shaft head; the cleaning friction wheel is encased inside the aluminum sheet pressing component, and the interior of the aluminum sheet pressing component is horizontally aligned with the bottom of the cleaning friction wheel. By integrally forming the bottom end of the friction welding drill rod, the cleaning friction wheel, and the friction stir welding head, and by using the aluminum sheet pressing component for axial connection, the ultra-thin aluminum plate can be effectively pressed during the friction welding process, ensuring a tight, gapless weld.

Description

Technical Field

[0001] This application relates to the field of friction stir welding technology, and more specifically, to a friction welding device for ultrathin aluminum plates. Background Technology

[0002] Friction welding is a method of welding that utilizes the heat generated by friction between the contact surfaces of workpieces as a heat source, causing the workpieces to undergo plastic deformation under pressure. Under constant or increasing pressure and torque, heat is generated in the friction surface and its vicinity by the relative motion between the welding contact surfaces, thereby achieving material joining. As a metal joining technology, friction welding achieves metal welding by generating high-speed frictional heat between two workpieces. It boasts high productivity, low cost, and minimal deformation, and is therefore widely used in many industries.

[0003] With the progress of the times and the development of science and technology, all industries have increasingly higher requirements for the environmental protection and precision of materials. Aluminum has the characteristics of high specific strength, good electrical and thermal conductivity, and excellent corrosion resistance. When using fusion welding to join aluminum materials, problems such as large thermal deformation and numerous pores are often encountered. Friction stir welding is gradually gaining widespread attention, especially in the field of aluminum welding. 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 being 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. However, due to its extremely thin thickness, ultra-thin aluminum plates have poor rigidity and are easily deformed during friction welding due to external forces or the release of their own stress. Among them, the key problem leading to the decline in welding quality is that the two ultra-thin aluminum plates are not tightly bonded together: during welding, if there are tiny gaps or looseness between the plates, the heat generated by friction will be unevenly distributed, and defects such as pores and slag inclusions will easily form at the weld. In severe cases, there may even be hidden dangers such as weak welding and joint breakage, which directly affect the service life and safety of the product. Utility Model Content

[0004] To overcome the above deficiencies, this application provides an ultra-thin aluminum plate friction welding device to solve the problem of reduced weld quality during the ultra-thin aluminum plate friction welding process mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A friction welding device for ultra-thin aluminum plates includes a welding machine connecting shaft head, characterized in that: a friction welding drill rod is assembled inside the welding machine connecting shaft head, a cleaning friction wheel is integrally formed at the bottom end of the friction welding drill rod, a stirring friction welding head is integrally formed at the center point of the bottom surface of the cleaning friction wheel, an aluminum sheet pressing component is provided on the outer wall of the friction welding drill rod, the surface of the aluminum sheet pressing component is in contact with the bottom end of the welding machine connecting shaft head, the cleaning friction wheel is covered inside, and the inside is horizontally aligned with the bottom of the cleaning friction wheel.

[0007] Furthermore, the bottom end of the friction welding drill rod is integrally formed with the cleaning friction wheel and the stirring friction welding head, and the outer top is locked to the inside of the welding machine connecting shaft.

[0008] Furthermore, the cleaning friction wheel has a chamfered edge and a horizontal bottom, and is integrally formed with the friction stir welding head.

[0009] Furthermore, the tip of the friction stir welding head corresponds to the axis of the friction welding drill rod via the cleaning friction wheel.

[0010] Furthermore, the aluminum sheet pressing component consists of a fixing ring, four pressing blocks, a pressing cylinder, and a transition component. The inner ring of the fixing ring is axially connected to the outer wall of the friction welding drill rod, and its top is in contact with the bottom end of the welding machine connecting shaft head, while its bottom is horizontally in contact with the surface of the cleaning friction wheel. The opposite ends of the four pressing blocks are integrally formed with the outer wall of the fixing ring, and their disjointed ends are integrally formed with the top of the inner part of the pressing cylinder. The inner ring of the pressing cylinder is larger than the outer ring of the cleaning friction wheel, and the transition component is provided at the bottom.

[0011] Furthermore, the transition component consists of a notch, an extension ring, and an outer arc edge. The notch is provided on the side wall of the pressing cylinder, and the extension ring is integrally formed on the outer bottom edge. The outer arc edge is provided at the bottom of the extension ring, and the outer arc edge transitions along the pressing cylinder.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model incorporates an aluminum sheet pressing component, whose bottom pressing cylinder forms an outer arc-shaped pressing structure through transition components (including a notch, an extension ring, and an outer arc edge). Before friction welding, this component can pre-press two ultra-thin aluminum sheets tightly onto the welding path, completely solving the welding gap problem caused by the inability of traditional devices to pre-press the sheet material, ensuring no gaps or pores at the weld, and significantly improving weld strength and airtightness.

[0014] 2. This utility model integrates the cleaning friction wheel and the friction stir welding head into a single unit, coaxially positioned at the bottom of the friction welding drill rod. During welding, the horizontal bottom edge of the cleaning friction wheel can pre-scrape away the oxide layer and impurities on the aluminum plate surface, after which the friction stir welding head immediately performs friction welding on the clean surface. This integrated "cleaning-welding" design avoids secondary contamination caused by process separation, improving welding efficiency and reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the ultra-thin aluminum plate friction welding device provided in the embodiments of this application;

[0017] Figure 2 A schematic diagram of the internal structure of the ultrathin aluminum plate friction welding device provided for the embodiments of this application;

[0018] Figure 3 A schematic diagram of the connection structure between the friction-welded drill rod and the transition component provided in an embodiment of this application;

[0019] Figure 4 A schematic diagram of the connection structure between the friction welding drill rod, the cleaning friction wheel, and the pressing cylinder provided in the embodiments of this application;

[0020] Figure 5 A schematic diagram of the welding machine connecting shaft head structure provided in the embodiments of this application.

[0021] In the diagram: 1-Welding machine connecting shaft head; 2-Friction welding drill rod; 3-Cleaning friction wheel; 4-Friction stir welding head; 5-Aluminum sheet pressing component; 51-Fixing ring; 52-Pressure block; 53-Pressure cylinder; 54-Transition component; 541-Notch; 542-Extension ring; 543-Outer arc edge. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] Example:

[0024] Please see Figure 1 , Figure 2 , Figure 5An ultra-thin aluminum plate friction welding device includes a welding machine connecting shaft 1, which serves as a power input end, locks the friction welding drill rod 2 through an internal locking structure, and drives the friction welding drill rod 2 to rotate at high speed.

[0025] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 An ultra-thin aluminum plate friction welding device includes a friction welding drill rod 2 installed inside a welding machine connecting shaft head 1. A cleaning friction wheel 3 is integrally formed at the bottom end of the friction welding drill rod 2. A stirring friction welding head 4 is integrally formed at the center point of the bottom surface of the cleaning friction wheel 3. An aluminum sheet pressing component 5 is provided on the outer wall of the friction welding drill rod 2. The surface of the aluminum sheet pressing component 5 is in contact with the bottom end of the welding machine connecting shaft head 1, and the cleaning friction wheel 3 is covered inside. The inside of the aluminum sheet pressing component 5 is horizontally aligned with the bottom of the cleaning friction wheel 3. The aluminum sheet pressing component 5 consists of a fixing ring 51, four pressing blocks 52, a pressing cylinder 53, and a transition component 54. The transition component 54 consists of a notch 541, an extension ring 542, and an outer arc edge 543.

[0026] The friction welding drill rod 2 is integrally formed with the cleaning friction wheel 3 and the friction stir welding head 4, all three being coaxially designed to ensure dynamic balance accuracy during rotation. The friction welding drill rod 2 is used for locking and connecting to the welding machine's connecting shaft 1, and also facilitates the shaft connection of the aluminum sheet pressing component 5. The cleaning friction wheel 3 is used to press and clean oxides and contaminants from the surface of the thin aluminum sheet during friction welding with the friction stir welding head 4. The high-speed rotation of the friction stir welding head 4 utilizes rotational friction to flow from the front to the rear of the head, forming a dense solid-phase weld under the pressure of the cleaning friction wheel 3.

[0027] The aluminum sheet clamping component 5 is responsible for pre-clamping the weld joint of the thin aluminum sheet during friction stir welding (FSW) with the friction stir welding head 4, ensuring a tight fit between the thin aluminum sheets. The fixing ring 51 is axially connected to the friction stir welding drill rod 2 and is used to position the pressing cylinder 53 and the transition component 54 on the outer wall of the friction stir welding drill rod 2 via four clamping blocks 52. The four clamping blocks 52 act as a connecting bridge between the fixing ring 51 and the pressing cylinder 53, and clamp the pressing cylinder 53. The pressing cylinder 53 is larger than the cleaning friction wheel 3, enabling pre-clamping of the thin aluminum sheet, allowing the cleaning friction wheel 3 and the friction stir welding head 4 to weld the seam of the thin aluminum sheet. The transition component 54 ensures that the bottom of the pressing cylinder 53 can slide smoothly on the surface of the thin aluminum sheet. During FSW welding, the bottom of the pressing cylinder 53 slides on the surface of the thin aluminum sheet via the outer arc edge 543 of the outer bottom of the extension ring 542, exposing the area of ​​the thin aluminum sheet to be friction stir welded through the notch 541.

[0028] It should be noted that the specific model and specifications of the welding machine connecting shaft head 1 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0029] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An apparatus for friction welding of ultra-thin aluminium sheets comprising a welding machine connecting shaft head (1), characterised in that: The welding machine connecting shaft head (1) is equipped with a friction welding drill rod (2). The bottom end of the friction welding drill rod (2) is integrally formed with a cleaning friction wheel (3). The center point of the bottom surface of the cleaning friction wheel (3) is integrally formed with a stirring friction welding head (4). The outer wall of the friction welding drill rod (2) is equipped with an aluminum sheet pressing component (5). The surface of the aluminum sheet pressing component (5) is in contact with the bottom end of the welding machine connecting shaft head (1), and the cleaning friction wheel (3) is covered inside. The inside is horizontally corresponding to the bottom of the cleaning friction wheel (3).

2. The apparatus for friction welding of ultra-thin aluminum plates according to claim 1, wherein The bottom end of the friction welding drill rod (2) is integrally formed with the cleaning friction wheel (3) and the stirring friction welding head (4), and the outer top is locked to the inside of the welding machine connecting shaft head (1).

3. A device for friction welding of ultra-thin aluminum sheets according to claim 2, characterized in that, The cleaning friction wheel (3) has chamfered edges and a horizontal bottom, and is integrally formed with the friction stir welding head (4).

4. The apparatus of claim 3, wherein the apparatus is configured to perform friction welding of the super-thin aluminum plate with a thickness of 0.2 mm or less. The tip of the friction stir welding head (4) corresponds to the axis of the friction welding drill rod (2) through the cleaning friction wheel (3).

5. A device for friction welding of ultra-thin aluminum sheets according to claim 4, characterized in that, The aluminum sheet pressing component (5) consists of a fixing ring (51), four pressing blocks (52), a pressing cylinder (53), and a transition component (54). The inner ring of the fixing ring (51) is axially connected to the outer wall of the friction welding drill rod (2), and its top is attached to the bottom end of the welding machine connecting shaft head (1). Its bottom is horizontally attached to the surface of the cleaning friction wheel (3). The opposite ends of the four pressing blocks (52) are integrally formed with the outer wall of the fixing ring (51), and their disjoint ends are integrally formed with the top of the inner part of the pressing cylinder (53). The inner ring of the pressing cylinder (53) is larger than the outer ring of the cleaning friction wheel (3), and the transition component (54) is provided at the bottom.

6. A device for friction welding of ultra-thin aluminium sheets according to claim 5, characterized in that, The transition component (54) consists of a notch (541), an extension ring (542), and an outer arc edge (543). The notch (541) is provided on the side wall of the pressing cylinder (53), and the extension ring (542) is integrally formed on the outer bottom edge. The outer arc edge (543) is provided at the bottom of the extension ring (542), and the outer arc edge (543) transitions along the pressing cylinder (53).

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