Pipe fixing tool for preventing deviation

Abstract

The utility model discloses a kind of pipe fittings welding with fixed tooling capable of preventing deviation, it is related to pipe fittings welding technical field, including bearing plate, guide slot, limit roller, cylinder interface and drive slot, the driving mechanism is arranged on the bearing plate upper side, the driving mechanism includes spring, adjusting peg, driving rod and lead screw, the adjusting peg is inserted into the drive slot of lead screw by right side driving rod transmission power, realize equipment driving adjustment function, this tooling is formed by limit roller and down roller and is clamped in three-dimensional, limit roller anti-skid line limits pipe fittings radial movement, allows axial rotation, down roller pneumatic drive provides vertical clamping force to offset external force, cooperate lead screw and adjust guide frame spacing to adapt to different pipe diameter, mortise guide slot and I-shaped lead screw ensure that guide frame moves smoothly, improve welding positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of pipe welding technology, specifically a fixing fixture for pipe welding that can prevent misalignment. Background Technology

[0002] Pipe welding fixtures are specialized tools used to assist in pipe welding. Their main function is to precisely position and stably clamp the pipes during the welding process, preventing displacement due to external forces or thermal deformation, thereby ensuring welding quality and precision. However, existing pipe welding fixtures have some shortcomings, such as: The pipe welding positioning fixture described in application number CN202323531025.8 employs a complex structure consisting of a base plate, a slider pad, a fixture body, and various cylinders (clamping cylinders, threaded cylinders, etc.). This fixture achieves spatial positioning of the pipe through multi-cylinder linkage and utilizes guide rail sliders to adjust the length to accommodate pipes of different lengths, thus improving welding efficiency to some extent. However, its structure has several limitations. The multi-component collaborative mechanical system results in a high degree of fixture integration, with tight coupling between the pneumatic circuit and transmission mechanism, increasing the likelihood of malfunctions. Furthermore, problems with individual components, such as aging cylinder seals or wear on the guide rail slider, can lead to overall positioning deviations. Since troubleshooting involves multiple systems, maintenance requires a high level of expertise and incurs significant downtime costs. Additionally, this fixture relies solely on the linear displacement of the guide rail slider to adjust the pipe length, lacking precision adjustment mechanisms for pipe diameter, such as threaded drives or screw positioning devices. When the pipe diameter tolerance is small, the radial clamping gap is prone to causing positioning deviations, making it unsuitable for applications such as aerospace and precision instrument manufacturing that require high-precision welding. Furthermore, the rigid cylinder clamping surface lacks a buffer protection structure, which may damage the plating or precision-machined surfaces of the pipe during clamping. It also lacks a heat deformation suppression mechanism, such as an elastic clamping arm, making it unable to effectively cope with thermal stress when welding thin-walled pipes. Additionally, it lacks an adaptation module for irregularly shaped parts, such as an adjustable angle positioning component, making reliable positioning of irregularly shaped pipes difficult, resulting in significant limitations in its functional applications. Utility Model Content

[0003] The purpose of this utility model is to provide a fixing fixture for welding pipe fittings that can prevent misalignment, so as to solve the problems mentioned in the background art. The existing equipment on the market adopts a multi-cylinder and guide rail slider structure, which can position long pipe fittings and improve welding efficiency, but the structure is complex, making maintenance difficult and the risk of failure is high. In addition, it lacks designs such as precise pipe diameter adjustment, surface protection and heat deformation suppression, and is not suitable for high-precision and irregular pipe fittings.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fixing fixture for welding pipe fittings that can prevent misalignment, comprising a bearing plate, a guide groove, a limiting roller, a cylinder interface, and a drive groove; A drive mechanism is provided on the upper side of the support plate. The drive mechanism includes a spring, an adjusting bolt, a drive rod, and a lead screw. The adjusting bolt transmits power through the drive rod on the right side, which is inserted into the drive groove of the lead screw, thereby realizing the equipment drive adjustment function.

[0005] As a preferred embodiment of this utility model, eight bolt fixing holes are symmetrically arranged on the side of the bearing plate, and a guide groove is opened on the upper surface of the bearing plate. The guide groove adopts a mortise and tenon structure. Using the above technical solution, eight bolt fixing holes are symmetrically arranged on the side of the bearing plate, which facilitates the quick fixing of the tooling to the welding workbench or frame with bolts, ensuring stability and symmetry during installation and avoiding the impact of installation deviation on the positioning of the pipe fittings; a guide groove with a mortise structure is opened on the upper surface of the bearing plate, which can limit the vertical displacement of the guide frame when sliding with the guide frame, allowing it to slide only in the horizontal direction, improving the straightness and positioning accuracy of the guide frame movement, and thus ensuring the accuracy of the lateral position when the pipe fittings are clamped.

[0006] As a preferred technical solution of this utility model, the upper part of the bearing plate is slidably connected to the guide frame through the guide groove, the two guide frames are distributed in parallel, and the upper part of the guide frame is rotatably connected to the limiting roller, and the surface of the limiting roller is uniformly provided with anti-slip texture. Using the above technical solution, the upper part of the bearing plate is slidably connected to two parallel guide frames via a guide groove. The upper part of the guide frames is rotatably connected to a limiting roller. The surface of the limiting roller is uniformly provided with anti-slip texture. The anti-slip texture increases the friction with the pipe fitting, effectively limiting the radial movement of the pipe fitting. At the same time, the limiting roller can rotate freely without hindering the axial rotation of the pipe fitting, so as to cooperate with the welding operation. The arrangement of the two sets of parallel guide frames forms support for both sides of the pipe fitting. The rolling contact method can adapt to pipe fittings with various cross-sectional shapes such as round and elliptical, and reduces the wear of the pipe fitting surface. It is especially suitable for thin-walled pipe fittings or pipe fittings with high surface precision requirements.

[0007] As a preferred technical solution of this utility model, the cylinder interface is fixedly connected to the left side of the bearing plate, the cylinder interface is connected to the pneumatic telescopic rod, the fixed frame is fixedly connected above the pneumatic telescopic rod, the fixed frame is an L-shaped structure, and the lower pressure roller is rotatably connected to the right side of the fixed frame. The length of the lower pressure roller is one-fifth of that of the limiting roller, and the surface structure of the limiting roller is the same as that of the lower pressure roller. Using the above technical solution, a cylinder interface is fixedly connected to the left side of the bearing plate. The cylinder interface is connected to the pneumatic telescopic rod. An L-shaped fixing frame is fixedly connected above the pneumatic telescopic rod. A lower pressure roller is rotatably connected to the right side of the fixing frame. The length of the lower pressure roller is one-fifth of that of the limiting roller, and they have the same surface structure. Compressed air is introduced through the cylinder interface, and the pneumatic telescopic rod drives the fixing frame and the lower pressure roller to press down, forming a three-point stable clamping structure of "upper pressure and lower support" with the limiting roller. The clamping force in the vertical direction can offset the thermal deformation stress during welding, prevent the pipe from tilting upward, and further control the welding deviation error. The shorter design of the lower pressure roller can avoid the welding area of ​​the pipe, avoid interference with the welding operation, and concentrate the clamping force in the middle of the pipe, improving the clamping stability. Moreover, the clamping force is uniform and stable, reducing human operation error.

[0008] As a preferred technical solution of this utility model, a lead screw is rotatably connected above the bearing plate, and a guide frame is threadedly connected to the side of the lead screw. The lead screw is an I-shaped structure to prevent the lead screw from detaching from the bearing plate. Using the above technical solution, the lead screw rotatably connected above the bearing plate has an I-shaped structure. This structure forms a mechanical limit by having the wide ends abut against the upper and lower surfaces of the bearing plate, preventing the lead screw from disengaging from the bearing plate due to over-adjustment and ensuring the safety of the drive mechanism. The narrow waist of the lead screw can limit the axial movement range of the guide frame, while increasing the contact area between the lead screw and the bearing plate, reducing radial sway during rotation, making the guide frame move more smoothly along the lead screw thread, ensuring the accuracy of the guide frame spacing adjustment, and adapting to pipe fittings of different diameters.

[0009] As a preferred technical solution of this utility model, a drive groove is opened on the side of the lead screw. The drive groove has a hexagonal structure, and a drive rod is slidably connected to the left side of the drive groove. The drive rod is fixedly connected to the adjusting bolt. Using the above technical solution, a hexagonal drive groove is opened on the side of the lead screw. The drive rod, which is slidably connected to the adjusting bolt on the left side of the drive groove, forms a rigid fit with the hexagonal structure on both sides of the drive rod. When the adjusting bolt is rotated, the drive rod can accurately transmit power to the lead screw, avoiding the circumferential slippage problem that may occur in circular cross-section transmission, ensuring the precise correspondence between the rotation angle of the adjusting bolt and the rotation amount of the lead screw, and realizing the precise adjustment of the guide frame spacing. The adjusting bolt can be driven by a wrench or screwdriver. The hexagonal structure provides a clear force fulcrum, which is convenient for applying torque, especially suitable for scenarios requiring large adjustment force when adjusting large-diameter pipe fittings.

[0010] As a preferred technical solution of this utility model, a spring is fitted on the right side of the adjusting bolt, the driving rod is divided into three sections, and the two sides of the driving rod are hexagonal structures. The bearing plate and the adjusting bolt are connected by a driving groove that is the same as the side of the lead screw. The driving rod is slidably connected in the driving groove of the bearing plate.

[0011] Using the above technical solution, a spring is fitted on the right side of the adjusting bolt. The drive rod is divided into three sections with hexagonal structures on both sides. The connection position between the bearing plate and the adjusting bolt has the same drive groove as the side of the lead screw. During adjustment, the spring can buffer the impact force applied by the hand, preventing damage to the lead screw, drive rod, or adjusting bolt due to excessive force. After adjustment, the spring tension can automatically eliminate the gap between the drive rod and the drive groove, ensuring the rigid connection of the transmission mechanism and preventing guide frame displacement caused by vibration during welding. The hexagonal structures on both sides of the drive rod can respectively cooperate with the drive grooves of the lead screw and the bearing plate, allowing the adjusting bolt to be inserted into the drive from any direction on both sides of the tooling, adapting to different operating space constraints, and improving the rationality of ergonomic design and ease of operation.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This fixture forms a three-dimensional clamping mechanism of "lower support and upper pressure" through the limiting roller and the lower pressure roller. The anti-slip texture of the limiting roller restricts the radial movement of the pipe and allows axial rotation. The pneumatic drive of the lower pressure roller provides vertical clamping force to counteract external forces. The guide frame spacing is adjusted by the screw to adapt to different pipe diameters. The mortise guide groove and the I-shaped screw ensure smooth movement of the guide frame and improve welding positioning accuracy. 2. The pneumatic clamping assembly quickly clamps and places pipes using an air source, reducing manual labor and providing stable clamping force; the manual adjustment assembly uses a hexagonal drive structure to precisely control the guide frame spacing, with spring buffers to prevent component damage and eliminate gaps. The combination of pneumatic and manual operation is efficient and flexible, adapting to the rapid switching of multiple pipe specifications. 3. Tooling design incorporates mechanical limit and protection: I-shaped lead screw prevents detachment, pneumatic telescopic rod is equipped with pressure protection, spring buffer prevents vibration displacement; bearing plate bolt holes support quick installation and disassembly, guide frame sliding fit facilitates maintenance, roller body rolling contact adapts to various pipe shapes and reduces wear, taking into account safety, durability and operation friendliness. Attached Figure Description

[0013] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the cylinder interface and pneumatic telescopic rod structure of this utility model; Figure 3 This is a schematic diagram of the guide frame and drive groove structure of this utility model; Figure 4 This is a schematic diagram of the spring and adjusting bolt structure of this utility model; Figure 5 This is a schematic diagram of the drive rod and lead screw structure of this utility model; Figure 6 This is a schematic diagram of the lead screw and drive groove structure of this utility model.

[0014] In the diagram: 1. Bearing plate; 2. Guide groove; 3. Limiting roller; 4. Cylinder interface; 5. Pneumatic telescopic rod; 6. Fixing frame; 7. Lower pressure roller; 8. Guide frame; 9. Spring; 10. Adjusting bolt; 11. Drive rod; 12. Lead screw; 13. Drive groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-6 The present invention provides a fixed fixture for welding pipe fittings to prevent misalignment, comprising a bearing plate 1, a guide groove 2, a limiting roller 3, a cylinder interface 4, a pneumatic telescopic rod 5, a fixing frame 6, a lower pressure roller 7, a guide frame 8, a spring 9, an adjusting bolt 10, a drive rod 11, a lead screw 12, and a drive groove 13. The eight symmetrical bolt fixing holes on the side of the bearing plate 1 can quickly and securely install the tooling on the workbench, avoiding installation deviation from affecting positioning; the mortise structure guide groove 2 above it slides with the guide frame 8, allowing only the guide frame 8 to move horizontally, which significantly improves the lateral positioning accuracy. The two sets of parallel guide frames 8 form friction limit with the pipe through the anti-slip textured surface of the limiting roller 3, which not only suppresses radial shaking but also does not hinder axial rotation. With the rolling contact design, it can be adapted to various cross-section pipes and reduce surface wear. The cylinder interface 4 connects to the pneumatic telescopic rod 5 to drive the L-shaped fixed frame 6 and the lower pressure roller 7, forming a "top pressure and bottom support" three-point support with the limit roller 3. The vertical clamping force offsets the welding heat deformation. The short-sized lower pressure roller 7 avoids the welding area while concentrating the force. The pneumatic drive significantly improves efficiency compared to manual drive and the clamping force is uniform and stable. The I-shaped lead screw 12 is prevented from disengaging through the limit structure at both ends. The waist is threaded with the guide frame 8 to achieve spacing adjustment. Its hexagonal drive groove 13 and the rigid transmission of the drive rod 11 prevent slippage and ensure adjustment accuracy. The spring 9 on the right side of the adjusting bolt 10 buffers the adjustment impact and eliminates transmission clearance to prevent vibration displacement; the bidirectional hexagonal structure of the drive rod 11 supports driving from both sides, improving operational flexibility. The entire tooling, through mechanical limiting, pneumatic protection and rolling contact design, takes into account safety and reliability as well as rapid adaptation to multiple specifications of pipe fittings, effectively solving the welding misalignment problem and is suitable for diverse industrial scenarios.

[0017] Working principle: When using a fixed fixture for welding pipe fittings that can prevent misalignment, press and manually rotate the adjusting bolt 10 according to the pipe diameter, so that the drive rod 11 is released from the drive groove 13 of the bearing plate 1, and the drive rod 11 drives the screw 12 to rotate, so that the two sets of guide frames 8 move horizontally along the guide groove 2 of the mortise structure to the appropriate distance. Then, compressed air is introduced into the pneumatic telescopic rod 5 through the cylinder interface 4, pushing the L-shaped fixed frame 6 downward, so that the lower pressure roller 7 and the limit roller 3 form a three-point clamping structure of "lower support and upper pressure". The anti-slip texture on the surface of the limit roller 3 restricts the radial movement of the pipe fitting, and the lower pressure roller 7 provides vertical clamping force to offset the thermal deformation stress. During welding, the pipe fitting can rotate around the axial direction. During the adjustment process, the spring 9 buffers the impact force and eliminates the transmission gap. The two ends of the I-shaped screw 12 abut against the bearing plate 1 to prevent disengagement, and the waist restricts the axial movement of the guide frame 8, ensuring accurate positioning and stable operation.

[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing fixture for welding pipe fittings to prevent misalignment, comprising a support plate (1); characterized in that: A drive mechanism is provided on the upper side of the bearing plate (1). The drive mechanism includes a spring (9), an adjusting bolt (10), a drive rod (11), and a lead screw (12). The adjusting bolt (10) transmits power through the drive rod (11) inserted into the drive groove (13) of the lead screw (12) to realize the equipment drive adjustment function.

2. The fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The bearing plate (1) has eight bolt fixing holes symmetrically arranged on its side. The bearing plate (1) has a guide groove (2) on its upper surface. The guide groove (2) adopts a mortise structure.

3. The fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The bearing plate (1) is slidably connected to the guide frame (8) above the guide groove (2). The guide frame (8) has two parallel distributions, and the guide frame (8) is rotatably connected to the upper part of the guide roller (3). The surface of the guide roller (3) is uniformly provided with anti-slip texture.

4. The fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The bearing plate (1) is fixedly connected to the cylinder interface (4) on the left side. The cylinder interface (4) is connected to the pneumatic telescopic rod (5). The pneumatic telescopic rod (5) is fixedly connected to the upper part of the fixed frame (6). The fixed frame (6) has an L-shaped structure. The right side of the fixed frame (6) is rotatably connected to the lower pressure roller (7). The length of the lower pressure roller (7) is one-fifth of that of the limiting roller (3). The surface structure of the limiting roller (3) is the same as that of the lower pressure roller (7).

5. A fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The bearing plate (1) is rotatably connected to the lead screw (12) above it. The lead screw (12) is threadedly connected to the guide frame (8) on its side. The lead screw (12) is an I-shaped structure to prevent the lead screw (12) from detaching from the bearing plate (1).

6. The fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The lead screw (12) has a drive groove (13) on its side. The drive groove (13) is hexagonal and a drive rod (11) is slidably connected to the left side of the drive groove (13). The drive rod (11) is fixedly connected to the adjusting bolt (10).

7. A fixing fixture for welding pipe fittings to prevent misalignment according to claim 1, characterized in that, The spring (9) is fitted on the right side of the adjusting bolt (10). The driving rod (11) is divided into three sections, and the two sides of the driving rod (11) are hexagonal. The bearing plate (1) and the adjusting bolt (10) are connected by a driving groove (13) that is the same as the side of the lead screw (12). The driving rod (11) is slidably connected in the driving groove (13) of the bearing plate (1).

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