Positioning tool for welding process of container

Abstract

The utility model relates to welding positioning equipment technical field especially relates to a kind of container welding processing positioning tool, tool includes: pedestal assembly, pedestal assembly includes base plate;Supporting component, set up on base plate, supporting component includes the supporting roller of being set up in pairs, container is placed on supporting roller;And positioning component;Multiple positioning rods are synchronously expanded to form complete annular contact surface, even pressure container inner wall, and then the central axis of two containers tends to coincide;In addition, supporting roller and positioning rod form inside and outside double constraint, both ensure that container rotates freely around axis, and limit radial deviation;Transmission mechanism makes multiple positioning rods synchronous expansion to form complete annular contact surface, partial contact pressure is dispersed as uniform load, also can avoid container deformation, solve the problem that point positioning tool in prior art cannot realize overall positioning.

Description

Technical Field

[0001] This utility model relates to the field of welding positioning equipment technology, and in particular to a positioning fixture for container welding processing. Background Technology

[0002] In modern industrial production, pressure vessels are widely used in many important fields such as petroleum, chemical industry, and energy. The quality and safety of pressure vessels are directly related to the stable operation of the production process and the safety of people's lives and property.

[0003] Welding is a key step in the manufacturing process of pressure vessels, and its quality plays a decisive role in the overall performance of the pressure vessel. In the traditional pressure vessel welding process, positioning and rotation operations are mainly completed manually or by simple mechanical devices.

[0004] In particular, the welding positioning of large cylindrical metal pressure vessels has more drawbacks. For example, manual operation is not only labor-intensive, but also difficult to guarantee accuracy. Welders need to spend a lot of time and energy to adjust the position and angle of the pressure vessel, which not only reduces production efficiency, but also easily leads to unstable welding quality due to human factors.

[0005] Secondly, simple point positioning mechanical devices are difficult to adapt to cylindrical structures. Even after partial positioning is completed, there is a possibility of large deviations in the corresponding symmetrical positions. That is, in some cases where multi-angle welding is required, traditional devices are difficult to achieve precise angle adjustment, thus affecting the welding quality. Utility Model Content

[0006] The main purpose of this utility model is to provide a positioning fixture for container welding processing, which aims to solve the problem that point positioning fixtures in the prior art cannot achieve overall positioning.

[0007] To achieve the above objectives, this utility model provides a container welding and positioning fixture, which is used for welding and positioning the container. The fixture includes: Base assembly, the base assembly including a substrate; A support assembly is disposed on the substrate, the support assembly including a pair of support rollers, and the container is placed on the support rollers; A positioning assembly includes a positioning base, a pushing component, and a pair of positioning components. The positioning base is disposed inside the container, and the pushing component is disposed between the two positioning components. Each positioning component includes a positioning plate, a positioning cylinder, and a plurality of positioning rods. The positioning cylinder is fixedly disposed on the positioning base, and the positioning plate is slidably disposed on the positioning base. The plurality of positioning plates movably pass through the positioning plate and abut against the outer periphery of the positioning cylinder. The diameter of the positioning cylinder increases in the direction away from the pushing component. The pushing component is used to push the two positioning plates outward, and the outer periphery of the plurality of positioning rods abuts against the inner wall of the container.

[0008] Optionally, the positioning base includes a counterweight, a support plate, and two fixing plates. The counterweight abuts against the bottom surface inside the container, the two fixing plates are respectively disposed at the two ends of the counterweight, and the support plate is vertically disposed at the center of the counterweight.

[0009] Optionally, the positioning base further includes a sliding plate disposed between two fixed plates, the positioning plate being provided with a sliding groove that cooperates with the sliding plate, and the positioning cylinder being fixedly disposed on the fixed plate.

[0010] Optionally, the pushing component includes a push block and a driving component. The two ends of the push block are movably connected to push plates. The push plates of the push block are respectively movably connected to the push plates of another push block. The connecting part of the push plate is provided with a connecting shaft. The connecting shaft is provided with a worm gear. The driving component is disposed on the support plate. The output end of the driving component is connected to the worm gear.

[0011] Optionally, the driving component includes a drive motor, which is fixedly mounted on the support plate. The output end of the drive motor is provided with a reducer and a worm gear, and the worm gear is connected to the worm.

[0012] Optionally, a roller is provided on the lower end surface of the substrate.

[0013] Optionally, the positioning plate is a polygonal ring structure, the number of positioning rods matches the number of sides of the positioning plate, and the positioning rods move through the center of the outer side of the positioning plate.

[0014] Optionally, ball bearings are movably provided at both ends of the positioning rod.

[0015] Optionally, the push block abuts against the positioning plate, and the line connecting the ends of several positioning rods forms a positioning circle that coincides with the inner wall of the container that is spliced ​​together.

[0016] Optionally, the support assembly further includes an adjusting component, which includes an adjusting motor, the output end of which is connected to the support roller via a reducer.

[0017] This utility model proposes a container welding and positioning fixture. By pushing the part and applying axial thrust, two positioning plates slide back and forth. The positioning plates drive the positioning rods to move along the surface of the conical positioning cylinder. As the diameter of the conical surface gradually increases, the positioning rods generate radial displacement. With the increase of the pushing stroke, multiple positioning rods expand outward synchronously to form a complete annular contact surface, uniformly pressing the inner wall of the container, thereby aligning the central axes of the two containers and completing the positioning process. In addition, the support roller and the positioning rods form a double constraint, ensuring that the container can rotate freely around the axis while limiting radial displacement. The slope design of the conical positioning cylinder makes the displacement of the positioning rods proportional to the pushing stroke. By controlling the pushing amount, the clamping force can be precisely adjusted. This solves the problem that point positioning fixtures in the prior art cannot achieve overall positioning. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Figure 2 This is a partial structural diagram of an embodiment of the present utility model; Figure 3 The accompanying drawings of this utility model are attached. Figure 2 A magnified structural diagram of A; Figure 4 This is a schematic diagram of the positioning component in an embodiment of the present invention; Figure 5 This is another structural schematic diagram of the positioning component in an embodiment of the present invention.

[0019] Figure label: 1-Container, 2-Base assembly, 3-Support assembly, 4-Positioning assembly; 21-Substrate, 22-Roller; 31-Support roller, 32-Adjusting component, 33-Adjusting motor; 41-Positioning base; 42-Pushing part; 43-Positioning part; 411-Counterweight base, 412-Support plate, 413-Fixing plate, 414-Slide plate, 415-Slide groove; 421-Push block, 422-Driver, 423-Push plate, 424-Connecting shaft, 425-Worm gear, 426-Drive motor, 427-Worm wheel; 431-Positioning plate, 432-Positioning cylinder, 433-Positioning rod, 434-Ball bearing.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Example: Please refer to the attached document as well. Figures 1 to 5 This embodiment provides a welding and positioning fixture for container 1. The fixture is used for welding and positioning container 1. The fixture includes: Base assembly 2, the base assembly 2 including a substrate 21; A support assembly 3 is disposed on the substrate 21. The support assembly 3 includes a pair of support rollers 31, and the container 1 is placed on the support rollers 31. The positioning component 4 includes a positioning base 41, a pushing part 42, and a pair of positioning parts 43. The positioning base 41 is disposed inside the container 1, and the pushing part 42 is disposed between the two positioning parts 43. Each positioning part 43 includes a positioning plate 431, a positioning cylinder 432, and a plurality of positioning rods 433. The positioning cylinder 432 is fixedly disposed on the positioning base 41, and the positioning plate 431 is slidably disposed on the positioning base 41. The plurality of positioning plates 431 move through the positioning plate 431 and abut against the outer periphery of the positioning cylinder 432. The diameter of the positioning cylinder 432 increases in the direction away from the pushing part 42. The pushing part 42 is used to push the two positioning plates 431 outward, and the outer periphery of the plurality of positioning rods 433 abuts against the inner wall of the container 1.

[0026] It should be noted that the container 1 used for welding in this embodiment is preferably a storage tank in the fields of petroleum, chemical industry, energy, etc. Its basic structure is a large metal cylinder, and during the welding process, the two containers 1 need to be spliced ​​and positioned before welding and fixing.

[0027] It should also be noted that when container 1 is placed on support roller 31, pushing part 42 applies axial thrust to make the two positioning plates 431 slide back and forth. Positioning plate 431 drives positioning rod 433 to move along the surface of conical positioning cylinder 432. As the diameter of the conical surface gradually increases, positioning rod 433 generates radial displacement. As the pushing stroke increases, multiple positioning rods 433 expand outward synchronously to form a complete annular contact surface, uniformly pressing the inner wall of container 1, thereby making the central axes of the two containers 1 tend to coincide, completing the positioning process. In addition, support roller 31 and positioning rod 433 form double constraints inside and outside, which not only ensures that container 1 can rotate freely around the axis, but also restricts radial displacement. The slope design of conical positioning cylinder 432 makes the displacement of positioning rod 433 proportional to the pushing stroke. By controlling the pushing amount, the clamping force can be precisely adjusted.

[0028] Based on the above structure, automated positioning of the welding process of container 1 is achieved, eliminating manual adjustment and reducing the positioning operation time from 15 minutes to within 2 minutes. The conical transmission mechanism enables multiple positioning rods 433 to expand synchronously to form a complete annular contact surface, distributing local contact pressure into a uniform load and preventing deformation of container 1. The synergistic effect of the support roller 31 and the positioning rods 433 ensures that container 1 maintains axial stability during rotary welding, and the weld misalignment is controlled below 0.8mm, meeting ASME standard requirements. This solves the problem that point positioning fixtures in existing technologies cannot achieve overall positioning.

[0029] In this embodiment, the positioning base 41 includes a counterweight base 411, a support plate 412, and two fixing plates 413. The counterweight base 411 abuts against the bottom surface inside the container 1. The two fixing plates 413 are respectively disposed at the two ends of the counterweight base 411, and the support plate 412 is vertically disposed at the center of the counterweight base 411.

[0030] Understandably, the bottom surface of the counterweight 411 forms surface contact with the inner wall of the container 1, using its own weight to generate downward pressure to resist lateral loads during the welding process. Two fixed plates 413 are symmetrically distributed at both ends of the counterweight 411 along its length, forming a lateral constraint frame that restricts the horizontal displacement of the positioning base 41 within the container 1. The support plate 412 extends vertically along the central axis of the counterweight 411, with its top end connected to the positioning assembly 4, forming a support platform. Furthermore, when the container 1 is subjected to welding thermal stress or mechanical vibration, the counterweight 411 counteracts the disturbance through its mass inertia, the fixed plates 413 maintain a horizontal posture through symmetrical support, and the support plate 412 prevents bending deformation through rigid connection; together, these three components constitute a spatial stability system.

[0031] In this embodiment, the positioning base 41 further includes a sliding plate 414 disposed between two fixed plates 413. The positioning plate 431 is provided with a sliding groove 415, which cooperates with the sliding plate 414. The positioning cylinder 432 is fixedly disposed on the fixed plate 413.

[0032] It is also understandable that after the sliding plate 414 is embedded in the sliding groove 415, a sliding pair is formed. When the pushing part 42 applies a thrust, the positioning plate 431 moves in translational motion along the length of the sliding plate 414. The inner wall of the sliding groove 415 has a large contact area with the outer surface of the sliding plate 414, which keeps the positioning plate 431 in a horizontal state during movement, avoiding jamming caused by uneven force. After the positioning cylinder 432 is fixed to the fixing plate 413, its conical outer surface is always in contact with the end of the positioning rod 433. As the positioning plate 431 moves, the positioning rod 433 undergoes radial displacement along the conical surface of the positioning cylinder 432. Since the cooperation between the sliding plate 414 and the sliding groove 415 eliminates the rotational degree of freedom of the positioning plate 431, the displacement direction of the positioning rod 433 is always perpendicular to the axis of the container 1, ensuring that multiple positioning rods 433 expand outward synchronously to form a symmetrically distributed positioning circle.

[0033] In this embodiment, the pushing component 42 includes a push block 421 and a driving component 422. The two ends of the push block 421 are movably connected to push plates 423. The push plates 423 of the push block 421 are movably connected to the push plates 423 of another push block 421. The connecting part of the push plate 423 is provided with a connecting shaft 424. A worm gear 425 is provided on the connecting shaft 424. The driving component 422 is provided on the support plate 412. The output end of the driving component 422 is connected to the worm gear 425.

[0034] It is understandable that when the drive component 422 outputs rotational power, the worm gear 425 drives the connecting shaft 424 to rotate synchronously, causing the two sets of push plates 423 to form opposite displacements at both ends of the connecting shaft 424; the push plates 423 push the push blocks 421 to move along the slide rail of the positioning base 41 through the hinge point, and the opposing force generated by the two push blocks 421 causes the positioning plate 431 to expand outward symmetrically. The self-locking characteristic of the worm gear 425 transmission can prevent the positioning plate 431 from retracting when under pressure, and the linkage structure between the push plates 423 ensures the absolute synchronization of the displacement of the positioning plates 431 on both sides; the design of the drive component 422 being directly fixed to the support plate 412 shortens the power transmission path and avoids the cumulative gap caused by multi-stage transmission; it is also understandable that the pushing component 42 in this embodiment can be replaced by an electric jack.

[0035] In this embodiment, the driving component 422 includes a drive motor 426, which is fixedly mounted on the support plate 412. The output end of the drive motor 426 is provided with a reducer and a worm gear 427, which is connected to the worm 425.

[0036] It should be noted that the motor drives the reducer through the output shaft. The reducer converts the high-speed, low-torque input into a low-speed, high-torque output, and transmits power through the meshing of the worm gear 427 and worm 425. The rotation of the worm 425 causes the worm gear 427 to generate circumferential displacement, which in turn pushes the push block 421 in the positioning assembly 4 outward. Because the worm gear 427 and worm 425 transmission has a self-locking characteristic, the position of the positioning plate 431 can be kept fixed after the drive stops, avoiding displacement due to external interference. The introduction of the reducer allows the rotation angle of the motor to be precisely controlled. For example, every 1° rotation corresponds to a displacement of 0.05 mm for the positioning plate 431, thus realizing a fine-tuning function.

[0037] In this embodiment, a roller 22 is provided on the lower end surface of the substrate 21.

[0038] Preferably, the rollers 22 are installed symmetrically at the four corners of the lower end face of the substrate 21. When the welding position of the container 1 needs to be adjusted, the operator applies a horizontal pushing force to the substrate 21, generating rolling friction between the rollers 22 and the ground, causing the entire fixture to move in the direction of the pushing force. During the movement, the position of the container 1 on the support roller 31 is synchronously displaced relative to the external welding equipment, without needing to release the contact relationship between the support assembly 3 and the container 1. After the fixture moves to the target position, the rotation of the rollers 22 is restricted by the locking mechanism, allowing the substrate 21 to return to a static support state.

[0039] In this embodiment, the positioning plate 431 is a polygonal ring structure, the number of positioning rods 433 matches the number of sides of the positioning plate 431, and the positioning rods 433 move through the center of the outer side of the positioning plate 431.

[0040] Understandably, a positioning rod 433 is installed at the center of the outer side of each side of the polygonal annular structure. When the positioning plate 431 is pushed outward, all positioning rods 433 move synchronously along the normal direction of each side of the polygon. Due to the symmetry of the polygonal structure, the displacement of each positioning rod 433 is consistent, and its end eventually forms a positioning circle that is completely in contact with the inner wall of the container 1. For example, when the positioning plate 431 is octagonal, the eight positioning rods 433 expand outward simultaneously during the pushing process, and are evenly distributed on the inner circumference of the container 1, eliminating the gaps or local stress concentrations caused by traditional single-point positioning.

[0041] In this embodiment, ball bearings 434 are movably disposed at both ends of the positioning rod 433. It can be understood that the ball bearings 434 form rolling contact with the inner wall of the container 1, replacing the original sliding friction; since the rolling friction coefficient of the ball bearings 434 is significantly lower than that of sliding friction, the resistance encountered by the positioning rod 433 during movement is effectively reduced, avoiding the positioning plate 431 from getting stuck due to uneven frictional resistance.

[0042] In this embodiment, the push block 421 abuts against the positioning plate 431, and the line connecting the ends of several positioning rods 433 forms a positioning circle that coincides with the inner wall of the assembled container 1. When the push block 421 moves to both sides under the action of driving force, its inclined surface contacts the positioning plate 431, generating a radial component force, which pushes the positioning plate 431 to slide outward along the slide groove 415. When the positioning rods 433 move with the positioning plate 431, their ends are guided by the conical surface of the positioning cylinder 432 to form a predetermined trajectory. Finally, the line connecting the ends of all the rods forms a positioning circle that matches the inner diameter of the container 1. The diameter of this positioning circle is determined by the taper of the positioning cylinder 432 and the stroke of the push block 421. When the inner wall of the assembled section of the container 1 is completely in contact with the positioning circle, the axes of the inner and outer cylinders are automatically aligned.

[0043] In this embodiment, the support component 3 further includes an adjustment component 32, which includes an adjustment motor 33. The output end of the adjustment motor 33 is connected to the support roller 31 through a reducer.

[0044] Understandably, the regulating motor 33 is connected to the shaft of the support roller 31 via a reducer. When the welding position of the container 1 needs to be adjusted, the regulating motor 33 starts and outputs power. The power is reduced in speed by the reducer and then transmitted to the support roller 31, driving the support roller 31 to rotate at a set speed, thereby causing the container 1 to rotate around its axis. During this process, the reducer converts the higher speed of the motor into the lower speed required by the support roller 31 and ensures the smoothness of the rotation by increasing the torque. The encoder monitors the rotation angle of the motor in real time and feeds the signal back to the control system, forming a closed-loop regulation that allows the container 1 to accurately stop at the target welding position.

[0045] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning fixture for container welding processing, characterized in that, The tooling is used for welding and positioning the container, and the tooling includes: Base assembly, the base assembly including a substrate; A support assembly is disposed on the substrate, the support assembly including a pair of support rollers, and the container is placed on the support rollers; A positioning assembly includes a positioning base, a pushing component, and a pair of positioning components. The positioning base is disposed inside the container, and the pushing component is disposed between the two positioning components. Each positioning component includes a positioning plate, a positioning cylinder, and a plurality of positioning rods. The positioning cylinder is fixedly disposed on the positioning base, and the positioning plate is slidably disposed on the positioning base. The plurality of positioning plates movably pass through the positioning plate and abut against the outer periphery of the positioning cylinder. The diameter of the positioning cylinder increases in the direction away from the pushing component. The pushing component is used to push the two positioning plates outward, and the outer periphery of the plurality of positioning rods abuts against the inner wall of the container.

2. The container welding and positioning fixture as described in claim 1, characterized in that, The positioning base includes a counterweight, a support plate, and two fixing plates. The counterweight abuts against the bottom surface inside the container. The two fixing plates are respectively disposed at the two ends of the counterweight, and the support plate is vertically disposed at the center of the counterweight.

3. The container welding and positioning fixture as described in claim 1, characterized in that, The positioning base also includes a sliding plate disposed between two fixed plates. The positioning plate is provided with a sliding groove, which cooperates with the sliding plate. The positioning cylinder is fixedly disposed on the fixed plate.

4. The container welding and positioning fixture as described in claim 2, characterized in that, The pushing component includes a push block and a driving component. The two ends of the push block are movably connected to push plates. The push plates of the push block are movably connected to the push plates of another push block. A connecting shaft is provided at the connecting part of the push plate. A worm gear is provided on the connecting shaft. The driving component is provided on the support plate. The output end of the driving component is connected to the worm gear.

5. The container welding and positioning fixture as described in claim 4, characterized in that, The driving component includes a drive motor, which is fixedly mounted on the support plate. The output end of the drive motor is provided with a reducer and a worm gear, and the worm gear is connected to the worm.

6. The container welding and positioning fixture as described in claim 1, characterized in that, The lower end face of the substrate is provided with rollers.

7. The container welding and positioning fixture as described in claim 1, characterized in that, The positioning plate is a polygonal ring structure, the number of positioning rods matches the number of sides of the positioning plate, and the positioning rods move through the center of the outer side of the positioning plate.

8. A container welding and positioning fixture as described in claim 1 or 7, characterized in that, The two ends of the positioning rod are movably equipped with ball bearings.

9. The container welding and positioning fixture as described in claim 4, characterized in that, The push block abuts against the positioning plate, and the line connecting the ends of several positioning rods forms a positioning circle that coincides with the inner wall of the container that is spliced ​​together.

10. The container welding and positioning fixture as described in claim 1, characterized in that, The support assembly also includes an adjusting component, which includes an adjusting motor. The output end of the adjusting motor is connected to the support roller via a reducer.

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