A fixture for friction welding

Abstract

This utility model relates to the field of friction welding fixture technology, specifically to a fixture for friction welding, including a base with clamping seats symmetrically arranged at both ends. Each clamping seat has a mounting groove at both ends, and a U-shaped block is installed in the mounting groove. A clamping buffer mechanism is provided between the U-shaped block and the mounting groove. The U-shaped block buffers and protects the workpiece through the clamping buffer mechanism. A guiding mechanism is provided between the clamping seats to guide and fit the clamping seats at both ends. By using U-shaped blocks on the clamping seats to clamp the workpiece, the clamping force is more uniform, which helps to ensure the quality of the workpiece. Furthermore, the U-shaped blocks can be replaced, thereby reducing the maintenance cost of the fixture.

Description

Technical Field

[0001] This utility model relates to the field of friction welding tooling fixtures, and in particular to a fixture for friction welding. Background Technology

[0002] Some constant velocity drive shafts require a long shank sleeve design. The long shank sleeve consists of two parts: a blank at the cavity end and a blank at the shaft head end. Generally, the two blanks are welded into a whole by friction welding before subsequent machining.

[0003] Current friction welding equipment features a dual-station structure with two identical V-shaped clamps at the front and rear. When clamping the workpiece, the front and rear mechanical slides converge and close inwards, ultimately clamping the workpiece. The rotating spindle then drives the workpiece at the other end to rotate, achieving friction welding. However, when using V-shaped clamps, the contact between the V-shaped clamps and the workpiece is line contact. Due to the relatively large clamping force and the low surface hardness of the workpiece (typically around 20 HRC), a deep clamping mark is formed on the workpiece surface after clamping, affecting its appearance. Furthermore, the high clamping force causes significant stress at the bottom of the V-shaped structure, making it prone to cracking. The clamps have a short lifespan, often requiring replacement every 1-2 months, resulting in high tooling costs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a fixture for friction welding to solve the problems of workpiece surface damage and low tooling service life caused by using V-shaped clamping blocks to hold workpieces.

[0005] To achieve the above objectives, this utility model provides a fixture for friction welding, including a base, with clamping seats symmetrically arranged at both ends of the base. The clamping seats have mounting grooves at both ends, and U-shaped blocks are installed in the mounting grooves. A clamping buffer mechanism is provided between the U-shaped blocks and the mounting grooves. The U-shaped blocks buffer and protect the workpiece through the clamping buffer mechanism. A guiding mechanism is provided between the clamping seats to guide and fit the clamping seats at both ends.

[0006] A further improvement is that the U-shaped block and the mounting groove are installed using bolts.

[0007] A further improvement is that the mounting groove has a threaded hole, the U-shaped block has a mounting hole, the bolt passes through the mounting hole and is threadedly connected to the threaded hole, and the U-shaped block is slidably mounted on the bolt.

[0008] A further improvement is that the clamping and buffering mechanism includes a buffer spring, which is sleeved on the bolt. One end of the buffer spring is fixedly connected to the inner wall of the mounting groove. A slot is provided on the side of the U-shaped block near the mounting groove, and the other end of the buffer spring is engaged in the slot.

[0009] A further improvement is that the guiding mechanism includes a guide block and a guide groove. Guide blocks and guide grooves are symmetrically arranged on the upper and lower sides of both ends of the clamping seat. The guide blocks and guide grooves on the clamping seats at both ends are staggered and the guide blocks and guide grooves are adapted to each other.

[0010] A further improvement is that the clamping seat is C-shaped.

[0011] The beneficial effects of this utility model are as follows: By adopting an U-shaped clamping base with mounting grooves at both ends for mounting U-shaped blocks on the workpiece, dual-station clamping processing is achieved. Furthermore, using U-shaped blocks to clamp the workpiece ensures a more even distribution of clamping force, and the inclusion of buffer springs provides cushioning protection against clamping force, reducing damage to the workpiece and thus improving workpiece quality. The U-shaped blocks are installed with bolts, facilitating their installation and removal. Replacing the U-shaped blocks allows for maintenance of the tooling fixture, significantly reducing maintenance costs and consequently lowering production costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a top view of the base structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the clamping seat structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the clamping seat in an embodiment of this utility model.

[0014] The diagram is marked as follows: 1. Base; 2. Clamping seat; 3. Mounting slot; 4. U-shaped block; 5. Bolt; 6. Threaded hole; 7. Mounting hole; 9. Buffer spring; 10. Slot; 11. Guide block; 12. Guide groove. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0016] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] like Figure 1-3 As shown, this embodiment provides a fixture for friction welding, including a base 1. Clamping seats 2 are symmetrically arranged at both ends of the base 1. The clamping seats 2 are U-shaped and slidably mounted on the base 1. The clamping seats 2 are driven to move on the base 1 by a driving device and close from both ends towards the middle. The driving device is existing technology and is not specifically limited here. Mounting grooves 3 are provided at both ends of the clamping seats 2. U-shaped blocks 4 are installed in the mounting grooves 3. When clamping a workpiece, as the clamping seats 2 at both ends close towards the middle, the corresponding U-shaped blocks 4 on the clamping seats 2 close to form a circle with the same diameter as the workpiece, tightly clamping the workpiece. Since both ends of the clamping seats 2 are equipped with U-shaped blocks 4, two workpieces can be clamped simultaneously, realizing dual-station processing.

[0018] The U-shaped block 4 and the mounting groove 3 are installed together by bolts 5. The mounting groove 3 has a threaded hole 6, and the U-shaped block 4 has a mounting hole 7. The bolt 5 passes through the mounting hole 7 and is threadedly connected to the threaded hole 6. The U-shaped block 4 is slidably mounted on the bolt 5. A clamping and buffering mechanism is provided between the U-shaped block 4 and the mounting groove 3. The U-shaped block 4 uses the clamping and buffering mechanism to buffer and protect the workpiece. The clamping and buffering mechanism includes a buffer spring 9, which is sleeved on the bolt 5. One end of the buffer spring 9 is fixedly connected to the inner wall of the mounting groove 3. A slot 10 is provided on the side of the U-shaped block 4 near the mounting groove 3, and the other end of the buffer spring 9 is engaged in the slot 10. The U-shaped block 4 is pushed out of the mounting groove 3 by the buffer spring 9, and the end of the bolt 5 limits the outward movement of the U-shaped block 4. When the U-shaped block 4 clamps the workpiece, the workpiece pushes the U-shaped block 4 into the mounting groove 3. After it moves into place, the end of the bolt 5 is in the mounting hole 7. The elasticity of the buffer spring 9 reduces vibration when the workpiece is friction welded, thus improving the stability during processing.

[0019] A guiding mechanism is provided between the clamping seats 2 to guide and align the two clamping seats 2 at both ends. The guiding mechanism includes guide blocks 11 and guide grooves 12. Guide blocks 11 and guide grooves 12 are symmetrically arranged on the upper and lower sides of both ends of the clamping seats 2. The guide blocks 11 and guide grooves 12 on both ends of the clamping seats 2 are staggered and adapted to each other. When the two clamping seats 2 at both ends approach each other, the guide block 11 on one end of the clamping seat 2 is inserted into the guide groove 12 on the other end of the clamping seat 2, thereby making the two clamping seats 2 close precisely and reducing the occurrence of misalignment.

[0020] During processing, the workpiece is placed on the base 1, and the clamping seats 2 at both ends are driven to close in the middle. Guided by the guide block 11 and guide groove 12, the clamping seats 2 at both ends are precisely aligned and closed. The U-shaped block 4 contacts and closes to form a circle with the same diameter as the workpiece. The buffer spring 9 ensures that the U-shaped block 4 fits tightly against the workpiece and clamps it, thereby improving the stability of the workpiece clamping. The rotating spindle drives the workpiece at the other end to rotate, rubbing against the section of the workpiece clamped by the fixture and applying a certain forging force, thereby achieving friction welding.

[0021] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamp for friction welding, comprising a base (1), characterised in that, Clamping seats (2) are symmetrically arranged at both ends of the base (1). Installation grooves (3) are formed at both ends of the clamping seats (2). A U-shaped block (4) is installed in the installation groove (3). A clamping buffer mechanism is arranged between the U-shaped block (4) and the installation groove (3). The U-shaped block (4) buffers and protects the workpiece through the clamping buffer mechanism. A guiding mechanism is arranged between the clamping seats (2), and the two clamping seats (2) at both ends are guided and fitted through the guiding mechanism.

2. A fixture for friction welding according to claim 1, wherein The U-shaped block (4) and the installation groove (3) are installed through a bolt (5).

3. A fixture for friction welding as claimed in claim 2, wherein Threaded holes (6) are formed in the installation groove (3), installation holes (7) are formed in the U-shaped block (4), the bolt (5) penetrates through the installation hole (7) and is threadedly connected to the threaded hole (6), and the U-shaped block (4) is slidably arranged on the bolt (5).

4. A fixture for friction welding as defined in claim 1, wherein The clamping buffer mechanism includes a buffer spring (9). The buffer spring (9) is sleeved on the bolt (5). One end of the buffer spring (9) is fixedly connected to the inner wall of the installation groove (3). A clamping groove (10) is formed on one side of the U-shaped block (4) close to the installation groove (3), and the other end of the buffer spring (9) is clamped in the clamping groove (10).

5. A fixture for friction welding as defined in claim 1, wherein The guiding mechanism includes a guiding block (11) and a guiding groove (12). Guiding blocks (11) and guiding grooves (12) are symmetrically arranged on the upper and lower sides at both ends of the clamping seat (2). The guiding blocks (11) and guiding grooves (12) on the two clamping seats (2) at both ends are arranged in a staggered manner, and the guiding block (11) and the guiding groove (12) are adapted to each other.

6. A fixture for friction welding as defined in claim 1, wherein The clamping seat (2) is in a U shape.

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