A fixing clamp for mechanical welding

Abstract

The utility model discloses a kind of fixed clamps for mechanical welding, including workbench and workpiece body, the top of workbench is provided with rotary control part, the top fixed mounting of rotary control part has fixed ring, the surface of fixed ring movably connects with clamping rod, one end of clamping rod extends to the inside of fixed ring through fixed ring, the inside of fixed ring is provided with the adjusting member for the control of clamping rod;The surface of workpiece body is movably sleeved in fixed ring.This utility model is through the synergic effect of rotary control part and adjusting member, the flexible clamping and synchronous movement of two groups of required welding workpiece body are realized, four groups of clamping rods are annular array distribution, effectively disperses clamping stress, avoids workpiece deformation or displacement, while four groups of clamping rods are effectively clamped in the ring core of two groups of fixed rings by close and away from each other operation of two groups of workpiece body, improve the concentricity of workpiece body, without later adjustment operation.

Description

Technical Field

[0001] This utility model relates to the field of fixing fixture technology, and in particular to a fixing fixture for mechanical welding. Background Technology

[0002] In the field of mechanical welding, fixtures are fundamental process equipment used for positioning and holding workpieces to be welded. Existing technologies commonly employ manual screw clamps, modular combination fixtures, or pneumatic / hydraulic clamping tables designed specifically for particular workpieces. These fixtures primarily use structures such as screws, pressure plates, jaws, or V-blocks to rigidly fix one or more workpieces, meeting basic welding position requirements and providing the operator with a relatively stable working reference.

[0003] In traditional welding, when butt welding two pipe fittings, two independent sets of clamping fixtures are typically used to hold and position each fitting. Because these fixtures are separate and lack a unified control benchmark, their integration is low. Furthermore, traditional clamping typically involves clamping plates, which affects the concentricity of the clamped fittings. Therefore, operators need to manually or separately drive the two workpieces for coarse positioning and fine alignment, making it difficult to guarantee concentricity and uniform bevel gap. Secondly, during adjustment, any change in the position of any workpiece directly affects the final butt welding accuracy. The step-by-step adjustment method easily introduces cumulative errors, leading to misalignment of the pipe fitting axes or misalignment of the interfaces. This not only increases the difficulty of subsequent welding but may also affect the quality of the weld joint due to excessive assembly deviations, resulting in defects such as stress concentration or incomplete penetration. This decentralized clamping system has a large footprint, low integration, and is difficult to integrate with automated welding equipment for efficient and continuous collaborative operation.

[0004] Therefore, how to provide a fixing fixture for mechanical welding is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a fixing fixture for mechanical welding, which solves the problems mentioned in the background section.

[0006] A mechanical welding fixture according to an embodiment of the present invention includes a worktable and a workpiece body. A rotation control component is provided on the top of the worktable, and a fixing ring is fixedly installed on the top of the rotation control component. A clamping rod is movably connected to the surface of the fixing ring. One end of the clamping rod passes through the fixing ring and extends to the inner side of the fixing ring. An adjustment component for controlling the clamping rod is provided on the inner side of the fixing ring. The fixing ring is movably sleeved on the surface of the workpiece body, and the end of the clamping rod located on the inner side of the fixing ring is movably connected to the surface of the workpiece body.

[0007] The rotation control component includes a rotating shaft, a rotating gear, a first worm gear, a first worm, a toothed plate, and a movable plate. The rotating shaft is rotatably connected to the top of the worktable. The rotating gear is fixedly sleeved on the surface of the rotating shaft. One end of the toothed plate is fixedly connected to the side of the movable plate. The first worm gear is fixedly connected to the top of the rotating shaft. The first worm is rotatably connected to the top of the worktable via a mounting base. The first worm meshes with the first worm gear. The toothed plate meshes with the rotating gear. There are two sets of toothed plates and movable plates, which are arranged in a circular array around the rotating gear.

[0008] The top of the workbench is fixedly connected to a slide rail, and the lower surfaces of the toothed plate and the movable plate are provided with slide grooves, with the slide rail movably connected inside the slide grooves.

[0009] A protective plate is fixedly installed on the top of the workbench, and the protective plate is located directly above the first worm gear and the first worm.

[0010] Each set of fixed rings corresponds to four sets of clamping rods, and the four sets of clamping rods are arranged in a ring array with the center of the fixed ring.

[0011] The fixing rings are fixedly connected to the top of the movable plate. The number and position of the fixing rings are the same as the number and position of the movable plate, and the centers of the two fixing rings are located on the same straight line.

[0012] The adjusting component includes a guide frame, a movable gear, a transmission gear, an internal gear ring, a series of toothed grooves, a second worm gear, and a second worm. The guide frame is fixedly connected to the inner wall of the fixed ring and movably sleeved on the surface of the clamping rod. The movable gear is rotatably connected to the side of the guide frame. The series of toothed grooves are formed on the side of the clamping rod, and the movable gear meshes with the series of toothed grooves. The transmission gear is fixedly connected to the side of the movable gear. The internal gear ring is rotatably connected to the inner wall of the fixed ring through a rotating bearing and meshes with the transmission gear. The second worm gear is fixedly connected to the side of a set of movable gears. The second worm is fixedly installed on the surface of the fixed ring through a fixed seat and meshes with the second worm gear.

[0013] Both the first and second worm gears have knobs fixedly connected to their end faces.

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

[0015] Through the coordinated action of the rotary control components and the adjustment components, flexible clamping and synchronous movement of the two sets of workpieces to be welded are achieved. The four sets of clamping rods are distributed in a ring array, which effectively disperses the clamping stress and avoids workpiece deformation or displacement. At the same time, the operation of the four sets of clamping rods moving closer and further away from each other effectively clamps the two sets of workpieces at the center of the two sets of fixed rings, improving the concentricity of the workpieces and eliminating the need for subsequent adjustment operations.

[0016] It adopts a combination structure of worm gear transmission and rack and pinion, which has a large transmission ratio and strong self-locking ability. It can finely adjust the clamping force and position, and is suitable for precision welding scenarios; the knob design further simplifies the operation process.

[0017] The dual fixed rings move synchronously and are coaxially designed, which can be adapted to workpieces of different sizes and shapes. The radial displacement of the clamping rod can be quickly adjusted by the adjustment component, thereby improving the applicability of the fixture.

[0018] The protective plate covers the worm gear transmission components to prevent welding spatter or impurities from entering and extend service life; the slide rail and slide groove cooperate to ensure smooth movement and avoid sudden deviation. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a mechanical welding fixture proposed in this utility model.

[0021] Figure 2 This is a three-dimensional cross-sectional structural diagram of the positions of the fixing ring and the clamping rod in a mechanical welding fixture proposed in this utility model.

[0022] Figure 3 This is a three-dimensional structural diagram of the position of the rotation control component in a mechanical welding fixture proposed in this utility model.

[0023] Figure 4 This is a three-dimensional structural diagram showing the position of the rotating gear and toothed plate in the rotating control component of a fixed fixture for mechanical welding proposed in this utility model.

[0024] Figure 5 This is a three-dimensional structural diagram showing the connection state of the fixing ring, adjusting component, and clamping rod in a mechanical welding fixture proposed in this utility model.

[0025] The attached diagram shows: 1. Worktable; 2. Workpiece body; 3. Rotation control component; 4. Fixed ring; 5. Clamping rod; 6. Adjusting component; 7. Rotating shaft; 8. Rotating gear; 9. First worm gear; 10. First worm; 11. Gear plate; 12. Movable plate; 13. Slide rail; 14. Slide groove; 15. Protective plate; 16. Guide frame; 17. Movable gear; 18. Transmission gear; 19. Internal gear ring; 20. Continuous tooth groove; 21. Second worm gear; 22. Second worm. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] refer to Figure 1-5 In this embodiment, a workbench 1 and a workpiece body 2 are included. A rotation control component 3 is provided on the top of the workbench 1. The rotation control component 3 includes a rotating shaft 7, a rotating gear 8, a first worm gear 9, a first worm 10, a toothed plate 11, and a movable plate 12. The rotating shaft 7 is rotatably connected to the top of the workbench 1. The rotating gear 8 is fixedly sleeved on the surface of the rotating shaft 7. One end of the toothed plate 11 is fixedly connected to the side of the movable plate 12. The first worm gear 9 is fixedly connected to the top of the rotating shaft 7. The first worm 10 is rotatably connected to the top of the workbench 1 through a mounting seat. The first worm 10 meshes with the first worm gear 9. The toothed plate 11 meshes with the rotating gear 8. There are two sets of toothed plates 11 and movable plates 12. The two sets of toothed plates 11 and movable plates 12 are arranged in a circular array with the rotating gear 8 as the center.

[0028] In specific implementation, the workpiece body 2 here is a pipe, the rotating shaft 7 stabilizes the rotating gear 8 and positions it, so that the rotating gear 8 rotates around the rotating shaft 7, and the two sets of toothed plates 11 are arranged in a ring array. In this way, when the rotating gear 8 rotates, it will synchronously drive the two sets of toothed plates 11 and the two sets of movable plates 12 to move closer to each other or further away from each other.

[0029] refer to Figure 1-5 In this embodiment, a slide rail 13 is fixedly connected to the top of the workbench 1, and a slide groove 14 is provided on the lower surface of the toothed plate 11 and the movable plate 12. The slide rail 13 is movably connected inside the slide groove 14.

[0030] In specific implementation, the slide rail 13 is used to stabilize the moving state of the movable plate 12 and the toothed plate 11. When the movable plate 12 and the toothed plate 11 move, they move along the slide rail 13 through the slide groove 14. The slide rail 13 has the functions of limiting and guiding.

[0031] refer to Figure 1-5 In this embodiment, a protective plate 15 is fixedly installed on the top of the workbench 1, and the protective plate 15 is located directly above the first worm gear 9 and the first worm 10.

[0032] In practice, the protective plate 15 is also used to prevent welding debris generated during welding from entering the meshing positions of the first worm gear 9 and the first worm 10, and the rotating gear 8 and the toothed plate 11, thus affecting their normal operation.

[0033] refer to Figure 1-5In this embodiment, a fixing ring 4 is fixedly installed on the top of the rotation control component 3. The fixing ring 4 is fixedly connected to the top of the movable plate 12. The number and position of the fixing rings 4 are the same as the number and position of the movable plate 12, and the centers of the two fixing rings 4 are located on the same straight line. A clamping rod 5 is movably connected to the surface of the fixing ring 4. One end of the clamping rod 5 passes through the fixing ring 4 and extends to the inner side of the fixing ring 4. An adjusting component 6 for controlling the clamping rod 5 is provided on the inner side of the fixing ring 4. The adjusting component 6 includes a guide frame 16, a movable gear 17, a transmission gear 18, an internal gear ring 19, a row of toothed grooves 20, a second worm gear 21, and a second worm 22. 16 is fixedly connected to the inner wall of the fixed ring 4. The guide frame 16 is movably sleeved on the surface of the clamping rod 5. The movable gear 17 is rotatably connected to the side of the guide frame 16. The continuous tooth groove 20 is opened on the side of the clamping rod 5. The movable gear 17 meshes with the continuous tooth groove 20. The transmission gear 18 is fixedly connected to the side of the movable gear 17. The internal tooth ring 19 is rotatably connected to the inner wall of the fixed ring 4 through a rotating bearing. The internal tooth ring 19 meshes with the transmission gear 18. The second worm gear 21 is fixedly connected to the side of a set of movable gears 17. The second worm 22 is fixedly installed on the surface of the fixed ring 4 through a fixed seat. The second worm 22 meshes with the second worm gear 21.

[0034] The fixing ring 4 is movably sleeved on the surface of the workpiece body 2, and the end of the clamping rod 5 located inside the fixing ring 4 is movably connected to the surface of the workpiece body 2.

[0035] In practice, reinforcing rods are fixedly connected to the two sides of the clamping rod 5 near the clamping end to increase the stability of clamping the workpiece body 2. The reinforcing rods are movably connected to the surface of the workpiece body 2. The centers of the two fixing rings 4 are located on the same straight line, which proves that the height and orientation of the two fixing rings 4 are consistent. The two fixing rings 4 are axially symmetrical about the rotating gear 8 as the axis of symmetry. This ensures the concentricity of the pipe fittings during clamping. After clamping, the center of the pipe fittings coincides with the center of the fixing rings 4. This clamping method can ensure the concentricity of the two sets of pipe fittings after clamping. Compared with ordinary clamping plate clamping, there is no need to adjust the concentricity afterward, reducing the cumbersome operation of docking.

[0036] refer to Figure 1-5 In this embodiment, knobs are fixedly connected to the end faces of both the first worm 10 and the second worm 22.

[0037] In practice, the knob design greatly facilitates the manual operation of the first worm gear 10 and the second worm gear 22. Here, the second worm gear 22 is tilted, as shown... Figure 1 and Figure 5 As shown, the second worm gear 22 is tilted to facilitate manual operation by the staff.

[0038] The working principle of this utility model is as follows:

[0039] The operator rotates the knob at the end of the first worm 10, driving the first worm wheel 9 to rotate the shaft 7 and the rotating gear 8 synchronously. The rotating gear 8 meshes with the toothed plates 11 on both sides, pushing the movable plate 12 to move radially along the slide rail 13, thereby adjusting the overall position of the fixed ring 4. After the workpiece is placed inside the two fixed rings 4, the operator rotates the knob at the end of the second worm 22, driving the movable gear 17 to rotate through the second worm wheel 21. The movable gear 17 meshes with the row of toothed grooves 20 on the side of the clamping rod 5, pushing the clamping rod 5 to move towards the workpiece. At the same time, the movable gear 17 transmits power through the meshing of the transmission gear 18 and the internal toothed ring 19, causing the four sets of clamping rods 5 to contract or expand synchronously. Finally, the workpiece body 2 is uniformly clamped and fixed. At this time, the two sets of pipes are concentric, and there is no need to adjust the concentricity of the pipes afterward. Then, the first worm 10 is operated again to drive the first worm wheel 9 to rotate. The rotation of the first worm wheel 9 drives the rotating gear 8 to rotate. The rotation of the rotating gear 8 drives the two sets of toothed plates 11 and movable plates 12 to move closer to each other. This, in turn, drives the fixing rings 4, clamping rods 5 and the clamped pipes on the two sets of movable plates 12 to move closer to each other, so that the two ends of the pipes are tightly fitted together. Then, welding is performed on them. Since the pipes are in a supported state, there is a certain distance between the bottom of the pipes and the rotation control component 3. In this way, welding operations can be performed around the pipes without rotating them.

[0040] 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 equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fixing fixture for mechanical welding, characterized in that, The worktable (1) and the workpiece body (2) are included. A rotation control component (3) is provided on the top of the worktable (1). A fixed ring (4) is fixedly installed on the top of the rotation control component (3). A clamping rod (5) is movably connected to the surface of the fixed ring (4). One end of the clamping rod (5) passes through the fixed ring (4) and extends to the inside of the fixed ring (4). An adjustment component (6) for controlling the clamping rod (5) is provided on the inside of the fixed ring (4). The fixing ring (4) is movably sleeved on the surface of the workpiece body (2), and the end of the clamping rod (5) located inside the fixing ring (4) is movably connected to the surface of the workpiece body (2).

2. The mechanical welding fixture according to claim 1, characterized in that, The rotation control component (3) includes a rotating shaft (7), a rotating gear (8), a first worm gear (9), a first worm (10), a toothed plate (11), and a movable plate (12). The rotating shaft (7) is rotatably connected to the top of the workbench (1). The rotating gear (8) is fixedly sleeved on the surface of the rotating shaft (7). One end of the toothed plate (11) is fixedly connected to the side of the movable plate (12). The first worm gear (9) is fixedly connected to the top of the rotating shaft (7). The first worm (10) is rotatably connected to the top of the workbench (1) through a mounting seat. The first worm (10) meshes with the first worm gear (9). The toothed plate (11) meshes with the rotating gear (8). There are two sets of toothed plates (11) and movable plates (12). The two sets of toothed plates (11) and movable plates (12) are arranged in a circular array with the rotating gear (8) as the center.

3. A fixing fixture for mechanical welding according to claim 2, characterized in that, The top of the workbench (1) is fixedly connected to a slide rail (13), and the lower surfaces of the toothed plate (11) and the movable plate (12) are provided with a slide groove (14), and the slide rail (13) is movably connected inside the slide groove (14).

4. A fixing fixture for mechanical welding according to claim 3, characterized in that, A protective plate (15) is fixedly installed on the top of the workbench (1), and the protective plate (15) is located directly above the first worm gear (9) and the first worm (10).

5. A fixing fixture for mechanical welding according to claim 4, characterized in that, Each set of fixed rings (4) corresponds to four sets of clamping rods (5), and the four sets of clamping rods (5) are arranged in a ring array with the center of the fixed ring (4).

6. A fixing fixture for mechanical welding according to claim 5, characterized in that, The fixing ring (4) is fixedly connected to the top of the movable plate (12). The number and position of the fixing ring (4) are the same as the number and position of the movable plate (12), and the centers of the two fixing rings (4) are located on the same straight line.

7. A fixing fixture for mechanical welding according to claim 6, characterized in that, The adjusting component (6) includes a guide frame (16), a movable gear (17), a transmission gear (18), an internal gear ring (19), a row of toothed grooves (20), a second worm gear (21), and a second worm (22). The guide frame (16) is fixedly connected to the inner wall of the fixed ring (4). The guide frame (16) is movably sleeved on the surface of the clamping rod (5). The movable gear (17) is rotatably connected to the side of the guide frame (16). The row of toothed grooves (20) is opened on the side of the clamping rod (5). The gear (17) meshes with the continuous tooth groove (20), the transmission gear (18) is fixedly connected to the side of the movable gear (17), the internal gear ring (19) is rotatably connected to the inner wall of the fixed ring (4) through the rotating bearing, the internal gear ring (19) meshes with the transmission gear (18), the second worm gear (21) is fixedly connected to the side of a set of movable gears (17), the second worm (22) is fixedly installed on the surface of the fixed ring (4) through the fixed seat, and the second worm (22) meshes with the second worm gear (21).

8. A fixing fixture for mechanical welding according to claim 7, characterized in that, Both the first worm (10) and the second worm (22) have knobs fixedly connected to their end faces.

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