Flattening device for friction stir welding

Abstract

The utility model discloses a flattening device for friction stir welding, and relates to the technical field of friction stir welding. The device comprises a mounting shell, a height adjusting assembly is arranged in the mounting shell, a mounting plate is arranged at the bottom of the height adjusting assembly, a mounting frame is arranged on the surface of the mounting plate, and a pressing wheel is rotationally connected to the surface of the mounting frame. A locking assembly and a positioning assembly which are used for limiting the mounting frame are mounted on the surface of the mounting plate, a supporting frame is fixedly mounted on the surface of the mounting shell, a stirring head is arranged on the surface of the supporting frame, the height adjusting assembly comprises a motor, and the motor is fixedly mounted on the top of the inner wall of the mounting shell. During use, the effect that the pressing wheel can be quickly disassembled conveniently is achieved, replacement is more convenient after the pressing wheel is abraded, and the maintenance cost and the time cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of friction stir welding technology, and specifically to a flattening device for friction stir welding. Background Technology

[0002] Friction stir welding is a solid-state joining technology that uses a high-speed rotating stirring head to generate heat through friction with the materials being welded, bringing the materials to a thermoplastic state and achieving bonding under the action of the stirring head. This technology has advantages such as low welding temperature, minimal deformation, and excellent joint performance, and is widely used in aerospace, rail transportation, shipbuilding, and other fields.

[0003] Friction stir welding is used on thin-plate workpieces with long weld seams, such as battery boxes for new energy vehicles. Due to the large area, the workpiece itself already has some deformation. During welding, the deformation becomes more pronounced due to localized heating. The deformation of the workpiece at the welding point causes the contact between the stirring pin and the workpiece to constantly change, resulting in unstable pressure. When the welding pressure is too low, the weld joint cannot form a dense structure, leading to reduced joint strength; when the welding pressure is too high, the friction between the stirring pin and the workpiece generates excessive heat, easily forming defects such as voids and tunnels inside the joint.

[0004] To address the aforementioned problems, existing technologies have proposed several devices and methods for flattening weld seams during the welding process. For example, Chinese Patent CN201910123456.7 discloses a flattening device for friction stir welding, which uses a pressure roller positioned behind the stirring head to roll and reduce the bulge height on the weld seam surface. However, this device has the following drawbacks: the pressure roller, as a consumable part, inevitably wears down after prolonged use, and the existing device's structural design makes disassembly and replacement of the pressure roller cumbersome, increasing maintenance and time costs.

[0005] Therefore, a flattening device for friction stir welding is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a flattening device for friction stir welding in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A flattening device for friction stir welding includes a mounting shell, a height adjustment assembly inside the mounting shell, a mounting plate at the bottom of the height adjustment assembly, a mounting bracket on the surface of the mounting plate, a pressure roller rotatably connected to the surface of the mounting bracket, a locking assembly and a positioning assembly for limiting the mounting bracket on the surface of the mounting plate, a support frame fixedly mounted on the surface of the mounting shell, and a stirring head on the surface of the support frame.

[0009] Furthermore, the height adjustment assembly includes a motor, which is fixedly mounted on the top of the inner wall of the mounting housing. A lead screw is fixedly connected to the output end of the motor, and a connecting bracket is threaded onto the surface of the lead screw. The connecting bracket is movably inserted into the bottom of the mounting housing, and the bottom end of the connecting bracket is fixedly connected to the mounting plate.

[0010] Furthermore, the positioning component includes a housing, which is fixedly connected to the left side of the mounting plate. A double-ended screw is rotatably connected to the inner wall of the housing, and a plug rod is threadedly connected to the surface of the double-ended screw. A sliding groove is formed through the right side of the housing, and the inner wall of the sliding groove is slidably connected to the surface of the plug rod. An insertion hole is formed on the right side of the mounting plate, and the inner wall of the insertion hole is movably inserted into the end of the mounting bracket. A positioning groove is formed on the surface of the mounting bracket, and the inner wall of the positioning groove is movably inserted into the end of the plug rod.

[0011] Furthermore, the locking assembly includes a worm gear, which is fixedly sleeved on the middle of the double-ended screw. A worm is rotatably connected to the surface of the housing, and the worm meshes with the worm gear. A knob is fixedly connected to the end of the worm.

[0012] Furthermore, the mounting shell and the support frame are fixedly connected by bolts.

[0013] Furthermore, the bottom of the pressure roller is initially higher than the bottom of the stirring head.

[0014] The beneficial effects of this utility model are as follows:

[0015] By adjusting the height of the component, the mounting plate and mounting bracket can be lowered, which in turn causes the pressure roller to descend and press against the weld seam. During the welding process of the stirring head, the pressure roller flattens the weld position. When the pressure roller wears out, by releasing the limiting action of the locking and positioning components, the mounting bracket can be pulled to the right to detach it from the surface of the mounting plate, allowing the mounting bracket to be disassembled and the pressure roller replaced. This design facilitates quick disassembly of the pressure roller and makes replacement easier when it wears out, reducing maintenance and time costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side sectional view of the mounting shell structure of this utility model;

[0018] Figure 3 This is a side sectional view of the box structure of this utility model;

[0019] Figure 4 This is a right view of the pressure roller structure of this utility model;

[0020] Figure 5 This is a right view of the mounting plate structure of this utility model;

[0021] Reference numerals: 1. Mounting housing; 2. Height adjustment assembly; 201. Motor; 202. Lead screw; 203. Connecting frame; 3. Mounting plate; 4. Mounting bracket; 5. Pressure roller; 6. Positioning assembly; 601. Box body; 602. Double-ended screw; 603. Insert rod; 604. Slide groove; 605. Insertion hole; 606. Positioning groove; 7. Locking assembly; 701. Worm gear; 702. Worm; 703. Knob; 8. Support frame; 9. Stirring head. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0026] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] like Figures 1 to 5 As shown, a flattening device for friction stir welding includes a mounting shell 1. A height adjustment assembly 2 is disposed inside the mounting shell 1. A mounting plate 3 is disposed at the bottom of the height adjustment assembly 2. A mounting bracket 4 is disposed on the surface of the mounting plate 3. A pressure roller 5 is rotatably connected to the surface of the mounting bracket 4. A locking assembly 7 and a positioning assembly 6 for limiting the mounting bracket 4 are mounted on the surface of the mounting plate 3. A support frame 8 is fixedly mounted on the surface of the mounting shell 1, and a stirring head 9 is disposed on the surface of the support frame 8. More specifically, by operating the height adjustment assembly 2, the mounting plate 3 and the mounting bracket 4 can be pushed down, thereby causing the pressure roller 5 to descend and press against the weld position. During the welding process of the stirring head 9, the pressure roller 5 flattens the weld position. When the pressure roller 5 wears down, by releasing the limiting effect of the locking assembly 7 and the positioning assembly 6, the mounting bracket 4 is pulled to the right, causing it to detach from the surface of the mounting plate 3. This allows the mounting bracket 4 to be disassembled, and the mounting bracket 4 and the pressure roller 5 to be replaced.

[0028] The height adjustment assembly 2 includes a motor 201, which is fixedly mounted on the top of the inner wall of the mounting housing 1. A lead screw 202 is fixedly connected to the output end of the motor 201. A connecting bracket 203 is threaded onto the surface of the lead screw 202, and the connecting bracket 203 is movably inserted into the bottom of the mounting housing 1. The bottom end of the connecting bracket 203 is fixedly connected to the mounting plate 3. It should be noted that the operation of the motor 201 drives the lead screw 202 to rotate, which, under the action of the thread, moves the connecting bracket 203, thereby pulling the mounting plate 3, the mounting bracket 4, and the pressure roller 5, allowing the pressure roller 5 to press against the weld surface.

[0029] The positioning component 6 includes a housing 601, which is fixedly connected to the left side of the mounting plate 3. A double-ended screw 602 is rotatably connected to the inner wall of the housing 601, and a plug rod 603 is threadedly connected to the surface of the double-ended screw 602. A sliding groove 604 is provided through the right side of the housing 601, and the inner wall of the sliding groove 604 is slidably connected to the surface of the plug rod 603. An insertion hole 605 is provided on the right side of the mounting plate 3, and the inner wall of the insertion hole 605 is movably inserted into the end of the mounting bracket 4. A positioning groove 606 is provided on the surface of the mounting bracket 4, and the inner wall of the positioning groove 606 is movably inserted into the end of the plug rod 603. More specifically, by rotating the double-ended screw 602, the insertion rod 603 is driven to slide along the inner wall of the slide groove 604 under the action of the thread, so that the end of the insertion rod 603 is disengaged from the inner wall of the positioning groove 606. Then, the mounting bracket 4 is pulled to the right, so that the end of the mounting bracket 4 is disengaged from the inner wall of the insertion hole 605, and the mounting bracket 4 and the pressure roller 5 can be disassembled, thus facilitating the replacement of the mounting bracket 4 and the pressure roller 5.

[0030] The locking assembly 7 includes a worm gear 701, which is fixedly sleeved on the middle of the double-ended screw 602. A worm 702 is rotatably connected to the surface of the housing 601, and the worm 702 meshes with the worm gear 701. A knob 703 is fixedly connected to the end of the worm 702. It should be noted that by rotating the knob 703, the worm 702 rotates, which in turn drives the meshing worm gear 701 to rotate, thus controlling the rotation of the double-ended screw 602. Simultaneously, the worm gear 701 and worm 702 achieve self-locking, thereby preventing the double-ended screw 602 from loosening.

[0031] The mounting housing 1 and the support frame 8 are fixedly connected by bolts. More specifically, during maintenance, the connection between the mounting housing 1 and the support frame 8 can be disconnected by removing the bolts, thus facilitating disassembly.

[0032] The bottom of the pressure roller 5 is initially higher than the bottom of the stirring head 9. It should be noted that before welding, the height of the pressure roller 5 is adjusted using the height adjustment component 2 to meet different clamping requirements.

[0033] In summary: By operating the height adjustment component 2, the mounting plate 3 and mounting bracket 4 can be lowered, thereby causing the pressure roller 5 to descend and press against the weld position. During the welding process of the stirring head 9, the pressure roller 5 is used to flatten the welding position. When the pressure roller 5 wears out, by releasing the limiting effect of the locking component 7 and the positioning component 6, the mounting bracket 4 can be pulled to the right to detach it from the surface of the mounting plate 3, thus allowing the mounting bracket 4 to be disassembled and the mounting bracket 4 and pressure roller 5 to be replaced. In use, this achieves the effect of quick disassembly of the pressure roller, and makes replacement more convenient when it wears out, reducing maintenance costs and time costs.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flattening device for friction stir welding, characterized in that, The device includes a mounting shell (1), inside which a height adjustment component (2) is provided, and at the bottom of the height adjustment component (2) a mounting plate (3) is provided, on the surface of the mounting plate (3) a mounting bracket (4) is provided, and on the surface of the mounting bracket (4) a pressure roller (5) is rotatably connected, and on the surface of the mounting plate (3) a locking component (7) and a positioning component (6) for limiting the mounting bracket (4) are installed, and on the surface of the mounting shell (1) a support frame (8) is fixedly installed, and on the surface of the support frame (8) a stirring head (9) is provided.

2. The flattening device for friction stir welding according to claim 1, characterized in that, The height adjustment assembly (2) includes a motor (201), and the motor (201) is fixedly installed on the top of the inner wall of the mounting shell (1). The output end of the motor (201) is fixedly connected to a lead screw (202). The surface of the lead screw (202) is threadedly connected to a connecting frame (203), and the connecting frame (203) is movably inserted into the bottom of the mounting shell (1). The bottom end of the connecting frame (203) is fixedly connected to the mounting plate (3).

3. The flattening device for friction stir welding according to claim 1, characterized in that, The positioning component (6) includes a box (601), and the box (601) is fixedly connected to the left side of the mounting plate (3). The inner wall of the box (601) is rotatably connected to a double-ended screw (602), and the surface of the double-ended screw (602) is threadedly connected to a plug rod (603). The right side of the box (601) is provided with a through groove (604), and the inner wall of the groove (604) is slidably connected to the surface of the plug rod (603). The right side of the mounting plate (3) is provided with a socket (605), and the inner wall of the socket (605) is movably inserted into the end of the mounting bracket (4). The surface of the mounting bracket (4) is provided with a positioning groove (606), and the inner wall of the positioning groove (606) is movably inserted into the end of the plug rod (603).

4. A flattening device for friction stir welding according to claim 3, characterized in that, The locking assembly (7) includes a worm gear (701), which is fixedly sleeved on the middle part of the double-ended screw (602). The surface of the housing (601) is rotatably connected to a worm (702), which meshes with the worm gear (701). A knob (703) is fixedly connected to the end of the worm (702).

5. A flattening device for friction stir welding according to claim 1, characterized in that, The mounting shell (1) and the support frame (8) are fixedly connected by bolts.

6. A flattening device for friction stir welding according to claim 2, characterized in that, The bottom of the pressure roller (5) is higher than the bottom of the stirring head (9) in the initial state.

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