A type of welding fixture

Abstract

This utility model relates to the field of workpiece clamping technology, and in particular to a welding clamping fixture, comprising a frame, wherein at least two elastic guide components are installed on the frame in a ring along a horizontal axis. Each elastic guide component includes a guide sleeve capable of elastic movement along the horizontal axis. The guide sleeve is slidably connected to a clamping rod inclined along the horizontal axis. The end of the clamping rod away from the horizontal axis abuts against a push-pull frame. A power pushing mechanism is provided between the push-pull frame and the frame, capable of driving the push-pull frame to reciprocate along the horizontal axis. The end of the clamping rod near the horizontal axis has a clamping head. Because the clamping rod is inclined, when the push-pull frame continues to push forward, it not only generates a radial clamping force, but also, by pushing the guide sleeves to elastically displace along the horizontal axis, gives the workpiece a pre-tightening force in the axial direction. This pre-tightening effect better ensures the tight fit of the workpiece mating surfaces, prevents gaps during welding, and improves the quality of the weld after welding.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, and in particular to a welding clamp for backing up. Background Technology

[0002] Welding is a common process for connecting metal structural components. Fixtures hold the workpiece in its designed position before welding. For shaft parts, most existing welding fixtures only have basic clamping and positioning functions, with clamping directions typically radial or lateral to prevent lateral movement of the workpiece during welding. However, these fixtures lack axial preload at the workpiece-to-workpiece mating points, failing to effectively clamp the mating surfaces. In practice, although the workpiece is fixed, there may still be slight gaps or deviations between the two mating surfaces, leading to misalignment of axes or uneven weld seams after welding. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing fixtures that lack axial preload at the workpiece-to-workpiece docking position, and to propose a new type of abutment welding fixture.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A welding fixture includes a frame with at least two elastic guide components arranged in a ring along a horizontal axis. Each elastic guide component includes a guide sleeve that can move elastically along the horizontal axis. The guide sleeve is slidably connected to a clamping rod that is inclined along the horizontal axis. The end of the clamping rod away from the horizontal axis abuts against a push-pull frame. A power pushing mechanism is provided between the push-pull frame and the frame, which can drive the push-pull frame to reciprocate along the horizontal axis. The end of the clamping rod near the horizontal axis has a clamp.

[0006] The elastic guide assembly includes a first support block fixedly connected to the frame, a first thrust spring connected between the end of the first support block away from the clamp and the guide sleeve, and a horizontally arranged first guide rod fixedly connected to the guide sleeve, the first guide rod being slidably connected to the first support block in the horizontal direction.

[0007] The clamp includes a base integrally formed with the clamping rod and a movable block slidably connected to the base. The surface of the movable block that slides relative to the base is an inclined sliding surface. The inclined sliding surface is parallel to the sliding direction of the clamping rod. The inclined sliding surface has a low end and a high end. The high end of the inclined sliding surface is close to the push-pull frame. A second support block is installed on the side of the base close to the push-pull frame. A second thrust spring is connected between the second support block and the movable block.

[0008] The movable block has an integral support base at the end away from the clamp, and the support base abuts against the push-pull frame.

[0009] The push-pull frame is a ferromagnetic metal frame, and the support base is a permanent magnet.

[0010] A pull rope connects the support base to the push-pull frame.

[0011] The power-driven garbage-pushing mechanism is a power telescopic cylinder. The telescopic direction of the power telescopic cylinder is set along the horizontal axis. The cylinder barrel of the power telescopic cylinder is fixed to the frame. The telescopic rod of the power telescopic cylinder is fixed to the push-pull frame. The push-pull frame is slidably connected to several second guide rods with horizontally set axes. The second guide rods are fixed to the frame.

[0012] The power-driven garbage-pushing mechanism includes a threaded rod arranged along a horizontal axis and rotatably connected to the frame. The threaded rod is threadedly connected to the push-pull frame. One end of the threaded rod is driven by a forward and reverse motor. The push-pull frame is slidably connected to several second guide rods arranged horizontally along their axes. The second guide rods are fixed to the frame.

[0013] The present invention provides a welding clamp with the following advantages: Because the clamping rods are arranged at an angle, when the push-pull frame continues to move forward, it not only generates radial clamping force but also, through the elastic displacement of the guide sleeve along the horizontal axis, provides pre-tightening force to the workpiece in the axial direction. This pre-tightening effect better ensures the tight fit of the workpiece's mating surfaces, prevents gaps during welding, and improves the quality of the weld after welding. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a partial state structure of the clamping shaft part of this utility model;

[0015] Figure 2 This is a partial front view schematic diagram of the clamping shaft part of this utility model;

[0016] Figure 3 This is a schematic diagram of the docking structure between the shaft-type part and the external part of this utility model.

[0017] Figure 4 This is a partial three-dimensional structural diagram of the docking structure of shaft-type parts and shaft-type parts according to this utility model;

[0018] Figure 5 This is a partial front view structural diagram of the shaft-type parts and their docking in this utility model.

[0019] In the figure: 1. Clamping head; 2. First guide rod; 3. First support block; 4. First thrust spring; 5. Guide sleeve; 6. Clamping rod; 7. Push-pull bracket; 8. Second guide rod; 9. Forward and reverse motor; 10. Threaded rod; 11. Support seat; 12. Second support block; 13. Second thrust spring; 14. Inclined sliding surface; 15. Base; 16. Movable block; 17. Elastic guide assembly. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0021] Reference Figures 1-5 A welding fixture includes a frame with at least two elastic guide components 17 arranged in a ring along a horizontal axis. Each elastic guide component 17 includes a guide sleeve 5 that can move elastically along the horizontal axis. The guide sleeve 5 is slidably connected to a clamping rod 6 that is inclined along the horizontal axis. The end of the clamping rod 6 away from the horizontal axis abuts against a push-pull frame 7. A power pushing mechanism is provided between the push-pull frame 7 and the frame, which can drive the push-pull frame 7 to reciprocate along the horizontal axis. The end of the clamping rod 6 near the horizontal axis has a clamp 1.

[0022] In use, the power push-pull mechanism is activated, driving the push-pull frame 7 forward along the horizontal axis. During its movement, the push-pull frame 7 abuts against the far end of the clamping rod 6, causing the clamping rod 6 to slide inward along its inclined direction. Due to the inclined installation of the clamping rod 6, as the clamping rod 6 slides inward, the chuck 1 at its end closest to the horizontal axis moves towards the center, thereby clamping the shaft-like workpiece. Each clamping rod 6 slides inclined within the guide sleeve 5. After multiple chucks 1 abut against the workpiece, the push-pull frame 7 continues to move a certain distance, pushing the guide sleeve 5, which moves elastically along the horizontal axis, horizontally a certain distance, achieving a pre-tightening clamping effect on the workpiece along its axial direction. When the power push-pull mechanism moves in the opposite direction, the push-pull frame 7 drives the clamping rod 6 to move in the opposite direction, and the chuck 1 gradually returns to its original position, completing the workpiece release process.

[0023] This device uses a power-driven push-pull mechanism to drive the push-pull frame 7 in reciprocating motion, achieving a linkage drive for the clamping rod 6. This causes the clamping rod 6 to slide along an inclined direction within the guide sleeve 5, gradually bringing the chuck 1 closer to the center, thus stably clamping the shaft-type workpiece. Because the clamping rod 6 is arranged at an angle, when the push-pull frame 7 continues to push forward, it not only generates radial clamping force but also, through the elastic displacement of the guide sleeve 5 along the horizontal axis, provides the workpiece with pre-tightening force in the axial direction. This pre-tightening effect better ensures the tight fit of the workpiece's mating surfaces, preventing gaps during welding and improving the quality of the weld after welding.

[0024] refer to Figure 2The elastic guide assembly 17 includes a first support block 3 fixedly connected to the frame. A first thrust spring 4 is connected between the end of the first support block 3 furthest from the chuck 1 and the guide sleeve 5. A horizontally positioned first guide rod 2 is fixedly connected to the guide sleeve 5, and the first guide rod 2 and the first support block 3 are slidably connected in the horizontal direction. Under the action of the first thrust spring 4, the guide sleeve 5 can generate elastic displacement in the horizontal direction, forming elastic support for the clamping rod 6. During clamping, when the push-pull frame 7 pushes the clamping rod 6 to slide inward in an inclined direction and the chuck 1 abuts against the workpiece, the push-pull frame 7 continues to move forward. While transmitting force, the clamping rod 6 drives the guide sleeve 5 to overcome the elastic resistance of the first thrust spring 4 and slide in the horizontal direction, causing the guide sleeve 5 to generate limited elastic displacement. This displacement further applies a preload force to the workpiece in the axial direction, thereby achieving a clamping effect in the axial direction and ensuring a tight fit between the workpiece end faces.

[0025] The chuck 1 includes a base 15 integrally formed with the clamping rod 6 and a movable block 16 slidably connected to the base 15. The surface on which the movable block 16 slides relative to the base 15 is an inclined sliding surface 14. The inclined sliding surface 14 is parallel to the sliding direction of the clamping rod 6 and has a low end and a high end. The high end of the inclined sliding surface 14 is close to the push-pull frame 7. A second support block 12 is installed on the side of the base 15 close to the push-pull frame 7. A second thrust spring 13 connects the second support block 12 and the movable block 16. During the clamping process, the inclined sliding surface 14 structure of the movable block 16 not only amplifies the radial clamping force, but also, because it is arranged along the sliding direction of the clamping rod 6, allows the movable block 16 to generate a certain axial component force when compressed, thereby forming an axial pre-tightening effect while clamping the workpiece.

[0026] The movable block 16 has an integral support base 11 at the end away from the clamp 1, and the support base 11 abuts against the push-pull frame 7; the push-pull frame 7 is a ferromagnetic metal frame, and the support base 11 is a permanent magnet. In another embodiment, a pull rope connects the support base 11 and the push-pull frame 7.

[0027] During clamping operations, when the push-pull frame 7 moves forward, it abuts against the support base 11 and transmits thrust, causing the clamping rod 6 to move in the inclined direction, which in turn drives the chuck 1 to clamp the workpiece. When the push-pull frame 7 moves in the reverse direction, if there is no fixed connection, the support base 11 may become stuck due to insufficient friction. To avoid this situation, a permanent magnet adsorption or pull rope connection is used to ensure that the support base 11 can stably maintain contact or traction with the push-pull frame 7, so that when the push-pull frame 7 returns, it synchronously drives the clamping rod 6 and the chuck 1 to return to their original positions, achieving reliable reset of the clamping mechanism.

[0028] The power-driven push-pull mechanism is used to drive the push-pull frame 7 to reciprocate along the horizontal axis, and can achieve two structural forms depending on the different driving methods.

[0029] The first type uses a power-operated telescopic cylinder as the pushing mechanism. The telescopic cylinder extends along a horizontal axis, with its cylinder barrel fixed to the frame and its telescopic rod fixed to a push-pull frame 7. The push-pull frame 7 is slidably connected to several horizontally aligned second guide rods 8, which are also fixed to the frame. When the telescopic cylinder extends, it drives the push-pull frame 7 forward along the horizontal axis, thereby pushing the clamping rod 6 to complete the clamping action. When the telescopic cylinder retracts, the push-pull frame 7 moves in the opposite direction, causing the clamping rod 6 and the chuck 1 to return to their original positions, thus releasing the workpiece.

[0030] The second type includes a power-driven pushing mechanism comprising a threaded rod 10 arranged along a horizontal axis and rotatably connected to the frame. The threaded rod 10 is threadedly connected to a push-pull frame 7. One end of the threaded rod 10 is driven by a forward and reverse motor 9. The push-pull frame 7 is slidably connected to several second guide rods 8 arranged horizontally, and the second guide rods 8 are fixed to the frame. When the motor 9 rotates forward, the threaded rod 10 drives the push-pull frame 7 to move forward in the horizontal direction, achieving clamping; when the motor 9 rotates in reverse, the push-pull frame 7 moves in the opposite direction, achieving the return of the clamp 1.

[0031] like Figure 3 As shown, this device can achieve welding and clamping of shaft parts with other parts, and can also... Figure 4 , Figure 5 As shown, it can realize the welding and clamping of shaft-like parts, where the two shafts can have the same diameter or different diameters.

[0032] It should be noted that when a component is connected to another component using connectors, including but not limited to "fixed," "installed," and "set," the connection can be directly on the other component or can be between two components. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture against which a workpiece is placed, comprising a frame, characterized in that, The frame is equipped with at least two elastic guide components (17) arranged in a ring along the horizontal axis. Each elastic guide component (17) includes a guide sleeve (5) that can move elastically along the horizontal axis. The guide sleeve (5) is slidably connected to a clamping rod (6) that is inclined along the horizontal axis. The end of the clamping rod (6) away from the horizontal axis abuts against a push-pull frame (7). A power pushing mechanism that can drive the push-pull frame (7) to reciprocate along the horizontal axis is provided between the push-pull frame (7) and the frame. The end of the clamping rod (6) near the horizontal axis has a clamp (1).

2. A welding fixture according to claim 1, wherein The elastic guide assembly (17) includes a first support block (3) fixedly connected to the frame. A first thrust spring (4) is connected between the end of the first support block (3) away from the clamp (1) and the guide sleeve (5). A first guide rod (2) is fixedly connected to the guide sleeve (5) in a horizontal direction. The first guide rod (2) and the first support block (3) are slidably connected in the horizontal direction.

3. A welding fixture according to claim 1, wherein The clamp (1) includes a base (15) integrally formed with the clamping rod (6) and a movable block (16) slidably connected to the base (15). The surface of the movable block (16) that slides relative to the base (15) is an inclined sliding surface (14). The inclined sliding surface (14) is parallel to the sliding direction of the clamping rod (6). The inclined sliding surface (14) has a low end and a high end. The high end of the inclined sliding surface (14) is close to the push-pull frame (7). A second support block (12) is installed on the side of the base (15) close to the push-pull frame (7). A second thrust spring (13) is connected between the second support block (12) and the movable block (16).

4. A welding fixture according to claim 3, wherein The movable block (16) is integrally provided with a support base (11) at one end away from the clamp (1), and the support base (11) abuts against the push-pull frame (7).

5. A welding fixture according to claim 4, wherein, The push-pull frame (7) is a ferromagnetic metal frame, and the support base (11) is a permanent magnet.

6. The abutment welding fixture according to claim 4, characterized in that, A pull rope connects the support base (11) and the push-pull frame (7).

7. A welding clamp according to any one of claims 1-3 and 5-6, characterized in that, The power pushing mechanism is a power telescopic cylinder. The telescopic direction of the power telescopic cylinder is set along the horizontal axis. The cylinder barrel of the power telescopic cylinder is fixed to the frame. The telescopic rod of the power telescopic cylinder is fixed to the push-pull frame (7). The push-pull frame (7) is slidably connected to several second guide rods (8) with horizontally set axes. The second guide rods (8) are fixed to the frame.

8. A welding clamp according to any one of claims 1-3 and 5-6, characterized in that, The power pushing mechanism includes a threaded rod (10) arranged along a horizontal axis and rotatably connected to the frame. The threaded rod (10) is threadedly connected to the push-pull frame (7). One end of the threaded rod (10) is connected to a forward and reverse motor (9). The push-pull frame (7) is slidably connected to several second guide rods (8) arranged horizontally. The second guide rods (8) are fixed to the frame.

Images