Water pipe inner chamfer welding positioning tool
Patent Information
- Application Number
- CN202522398647.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-12
AI Technical Summary
Traditional welding positioning fixtures are difficult to adapt to the inner chamfer of complex-shaped workpieces, resulting in large misalignment between the welded pipe and the workpiece interface, which affects the welding quality. Moreover, the adjustment is cumbersome and cannot meet the flexibility requirements of multi-variety, small-batch production.
The end shapes of the first and second workpiece contour positioning pins are perfectly matched with the inner chamfer of the workpiece. Combined with CNC machining technology, precise contour positioning is achieved. The adjustment blocks of the guide rail structure and the lever-type quick clamps enable rapid adjustment and high-precision clamping. Wear-resistant materials are used to ensure long service life.
It improves welding accuracy and efficiency, achieving a centering accuracy of ±0.1mm, a clamping force amplified by 3 times, and a service life extended by more than 3 times, meeting the requirements for rapid adaptation and stable clamping of workpieces of different specifications.
Smart Images
Figure CN224927348U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding tooling technology, and in particular to a positioning tooling for chamfering welding inside a water pipe. Background Technology
[0002] In industrial manufacturing, especially in scenarios involving pipe welding, welding positioning fixtures are key tools for ensuring welding quality and efficiency. However, existing welding positioning fixtures generally suffer from the following problems: Traditional tooling often uses general-purpose positioning structures (such as planar positioning blocks or fixed grooves), which are difficult to adapt to the inner chamfer of complex-shaped workpieces, resulting in large misalignment between the welded pipe and the workpiece interface, affecting the welding quality. Most tooling is a fixed structure, requiring the replacement of the entire positioning assembly for different specifications of workpieces, which is cumbersome and time-consuming, making it difficult to meet the flexibility requirements of multi-variety, small-batch production. The aforementioned defects severely restrict welding efficiency and product consistency, and there is an urgent need for a new type of welding positioning fixture with high-precision contour positioning, rapid adjustment function and stable clamping capability to solve the pain points of the existing technology. Utility Model Content
[0003] The main purpose of this utility model is to provide a positioning fixture for welding the inner chamfer of water pipes, which aims to solve the technical problem that traditional fixtures mostly use a general positioning structure, which is difficult to adapt to the inner chamfer of complex-shaped workpieces, resulting in a large misalignment between the welded pipe and the workpiece interface, thus affecting the welding quality.
[0004] To achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a water pipe internal chamfer welding positioning fixture, including a base mounting plate, a first workpiece contour positioning post, a second workpiece contour positioning post, two workpiece positioning blocks, a first pipe welding positioning part, a second pipe welding positioning part, a first pipe welding positioning mounting block, a second pipe welding positioning mounting block, a first quick clamp, a second quick clamp, and an adjustment block. The first workpiece contour positioning post, the second workpiece contour positioning post, and the workpiece positioning block are fixedly mounted on the base mounting plate for contour positioning and auxiliary positioning of the workpiece. The first pipe welding positioning and mounting block and the second pipe welding positioning and mounting block are fixedly mounted on the base mounting plate, and the first pipe welding positioning part and the second pipe welding positioning part are respectively installed for positioning the welding pipe. The first quick clamp and the second quick clamp are disposed on the corresponding workpiece positioning blocks for clamping and fixing the workpiece.
[0005] Furthermore, the end shapes of the first and second workpiece contour positioning posts match the inner chamfer shape of the workpiece to achieve precise contour positioning.
[0006] Furthermore, both the first workpiece contour positioning post and the second workpiece contour positioning post are provided with positioning surfaces adapted to the shape of the workpiece to restrict the movement of the workpiece.
[0007] Furthermore, the first pipe welding positioning part and the second pipe welding positioning part are respectively provided with arc-shaped positioning grooves for accommodating and positioning the welding pipe.
[0008] Furthermore, the first pipe welding positioning and mounting block and the second pipe welding positioning and mounting block are slidably mounted on the base mounting plate by adjusting blocks and fixed in position by bolt fasteners.
[0009] Furthermore, the adjusting block is disposed between the first pipe welding positioning mounting block or the second pipe welding positioning mounting block and the base mounting plate, and the adjusting block adopts a guide rail structure.
[0010] Furthermore, the first and second quick clamps are lever-type quick clamps, including clamping arms and pressing parts, for quickly clamping and releasing workpieces.
[0011] Furthermore, the base mounting plate is provided with multiple threaded holes or mounting grooves for fixing the first workpiece contour positioning post, the second workpiece contour positioning post, the workpiece positioning block, the first pipe welding positioning mounting block, and the second pipe welding positioning mounting block by bolts.
[0012] Furthermore, the first workpiece contour positioning post, the second workpiece contour positioning post, and the workpiece positioning block are symmetrically arranged with respect to the central axis of the base mounting plate to achieve balanced positioning of the workpiece.
[0013] Furthermore, the first tube welding positioning part and the second tube welding positioning part are made of wear-resistant metal material.
[0014] Beneficial effects: 1. The water pipe inner chamfer welding positioning fixture of this utility model achieves three-way workpiece limiting by using the end shapes of the first workpiece contour positioning post and the second workpiece contour positioning post to perfectly match the inner chamfer of the workpiece, and with the CNC machining process of the positioning surface, the centering accuracy is improved. The first pipe welding positioning mounting block and the second pipe welding positioning mounting block can be adjusted within the range through the adjustment block of the guide rail structure, so that it can be adapted to the welding requirements of different lengths and pipe diameters without replacing the entire set of fixtures.
[0015] 2. The water pipe internal chamfer welding positioning fixture of this utility model has a lever-type quick clamp with a force amplification ratio of 3:1, which can achieve a clamping force of ≥500N with only a small operating force. The rubber pad at the end of the clamp arm effectively prevents damage to the workpiece surface. The arc-shaped positioning groove is made of wear-resistant metal material and can withstand high welding temperature and high frequency friction after quenching treatment, which extends the service life by more than 3 times. Attached Figure Description
[0016] Figure 1 This is a cross-sectional schematic diagram of a water pipe chamfering welding positioning fixture according to an embodiment of the present invention; Figure 2 This is a top view schematic diagram of a water pipe chamfering welding positioning fixture according to an embodiment of the present invention; Figure 3 This is a front view partial structural schematic diagram of a water pipe chamfering welding positioning fixture according to an embodiment of this utility model.
[0017] in: 1-Workpiece contour positioning column; 21-First workpiece positioning block; 22-Second workpiece positioning block; 31-First pipe welding positioning part; 32-Second pipe welding positioning part; 41-First pipe welding positioning mounting block; 42-Second pipe welding positioning mounting block; 51-First quick clamp; 52-Second quick clamp; 6-Adjusting block; 7-Base mounting plate.
[0018] 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
[0019] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0023] Reference Figures 1-3 An embodiment of this utility model provides a water pipe internal chamfer welding positioning fixture, including a base mounting plate 7, a first workpiece contour positioning post 11, a second workpiece contour positioning post 12, two workpiece positioning blocks 2, a first pipe welding positioning part 31, a second pipe welding positioning part 32, a first pipe welding positioning mounting block 41, a second pipe welding positioning mounting block 42, a first quick clamp 51, a second quick clamp 52, and an adjustment block 6; The first workpiece contour positioning column 11, the second workpiece contour positioning column 12, and the workpiece positioning block 2 are fixedly mounted on the base mounting plate 7 for contour positioning and auxiliary positioning of the workpiece. The first pipe welding positioning mounting block 41 and the second pipe welding positioning mounting block 42 are fixedly mounted on the base mounting plate 7, and the first pipe welding positioning part 31 and the second pipe welding positioning part 32 are respectively installed for positioning the welding pipe. The first quick clamp 51 and the second quick clamp 52 are disposed on the corresponding workpiece positioning block 2 for clamping and fixing the workpiece.
[0024] Optionally, the base mounting plate 7 is provided with multiple threaded holes or mounting grooves for fixing the first workpiece contour positioning column 11, the second workpiece contour positioning column 12, the workpiece positioning block 2, the first pipe welding positioning mounting block 41, and the second pipe welding positioning mounting block 42 by bolts.
[0025] Optionally, the first workpiece contour positioning post 11, the second workpiece contour positioning post 12, and the workpiece positioning block 2 are symmetrically arranged with respect to the central axis of the base mounting plate 7.
[0026] The tooling described in this embodiment includes a base mounting plate 7, a first workpiece contour positioning post 11, a second workpiece contour positioning post 12, a workpiece positioning block 2, a welding positioning part, and a fixture assembly.
[0027] The base mounting plate 7 serves as the base of the overall structure and is made of high-strength steel plate. The surface is provided with threaded holes or mounting grooves to facilitate the quick installation of positioning columns, positioning blocks, and welding positioning mounting blocks.
[0028] The first workpiece contour positioning post 11 or the second workpiece contour positioning post 12 and the workpiece positioning block 2 are fixed to the base mounting plate 7 by bolts, forming a workpiece contour positioning and auxiliary positioning system. The symmetrical layout of the positioning posts and positioning blocks ensures that the workpiece is subjected to balanced forces and prevents displacement during the welding process.
[0029] The modular design of the base mounting plate 7 allows for quick adjustment of the position of each component to adapt to different workpiece sizes; the symmetrically arranged positioning components enable three-dimensional positioning of the workpiece, improving positioning stability and reducing the risk of welding deformation.
[0030] Optionally, the end shapes of the first workpiece contour positioning post 11 and the second workpiece contour positioning post 12 match the inner chamfer shape of the workpiece. Both the first workpiece contour positioning post 11 and the second workpiece contour positioning post 12 are provided with positioning surfaces adapted to the workpiece's shape to restrict workpiece movement.
[0031] Optionally, the first pipe welding positioning part 31 and the second pipe welding positioning part 32 are respectively provided with arc-shaped positioning grooves for accommodating and positioning the welded pipe. The first pipe welding positioning part 31 and the second pipe welding positioning part 32 are made of wear-resistant metal material.
[0032] It should be noted that the end shapes of the first workpiece contour positioning post 11 and the second workpiece contour positioning post 12 are completely matched with the inner chamfer contour of the workpiece, and the positioning surface is formed by CNC machining to form a groove consistent with the shape of the workpiece, which can restrict the radial movement and axial rotation of the workpiece.
[0033] The first pipe welding positioning part 31 and the second pipe welding positioning part 32 are respectively installed on the first pipe welding positioning mounting block 41 and the second pipe welding positioning mounting block 42. The bottom of each part is provided with multiple sets of arc-shaped positioning grooves, which can accommodate welding pipes of different diameters. The bottom of the grooves is made of wear-resistant metal material to extend the service life.
[0034] The matching design of the contour positioning post and the inner chamfer of the workpiece ensures that the alignment accuracy between the workpiece and the welded pipe reaches ±0.1mm after installation; the arc-shaped positioning groove, combined with wear-resistant material, can adapt to various pipe diameters and avoid wear of the positioning part caused by high welding temperature, thus ensuring long-term accuracy.
[0035] Optionally, the first pipe welding positioning mounting block 41 and the second pipe welding positioning mounting block 42 are slidably mounted on the base mounting plate 7 via the adjusting block 6 and fixed in position by bolt fasteners.
[0036] Optionally, the adjusting block 6 is disposed between the first pipe welding positioning mounting block 41 or the second pipe welding positioning mounting block 42 and the base mounting plate 7, and the adjusting block 6 adopts a guide rail structure.
[0037] It should be noted that the first pipe welding positioning mounting block 41 and the second pipe welding positioning mounting block 42 are slidably mounted on the base mounting plate 7 via adjusting blocks 6. The adjusting blocks 6 adopt a guide rail structure, and their sliding direction is parallel to the axis of the welded pipe. The position of the mounting blocks is fixed by bolt fasteners, and they are guide rails commonly used in the prior art.
[0038] The guide rail type adjustment block 6 allows the welding positioning mounting block to move within a range of ±20mm to meet the positioning requirements of workpieces of different lengths; the bolt fastening design ensures the stability of the position after adjustment and avoids displacement caused by welding vibration.
[0039] Optionally, the first quick clamp 51 and the second quick clamp 52 are lever-type quick clamps, including clamping arms and clamping parts, for quickly clamping and releasing workpieces.
[0040] The first quick clamp 51 and the second quick clamp 52 adopt a lever-type quick clamp structure. The clamping arms are connected to the positioning blocks through hinge shafts, and rubber pads are provided at the ends of the clamping parts. During operation, the clamping arms are driven to press down by rotating the handle to achieve quick clamping and release of the workpiece.
[0041] The lever structure provides a 3:1 force amplification ratio, allowing the operator to achieve sufficient clamping force with only a small amount of force; rubber pads reduce damage to the workpiece surface during clamping and prevent the clamp from slipping.
[0042] All metal parts are made of 45# steel and quenched, with a surface hardness ≥ HRC55 and a wear-resistant layer thickness ≥ 1.5mm; the base mounting plate 7 is annealed to eliminate internal stress and ensure that the flatness error is ≤ 0.05mm / m² for long-term use.
[0043] Description: During use, the water pipe chamfer welding positioning fixture is fixed to the worktable via threaded holes or mounting grooves on its surface. Then, the first workpiece contour positioning post 11 and the second workpiece contour positioning post 12 are symmetrically installed on the base mounting plate 7, their end shapes perfectly matching the chamfer contour of the workpiece. This ensures that the workpiece is three-way positioned by the contour positioning posts and the positioning surface after placement, preventing displacement or rotation during welding. Next, the workpiece positioning block 2 is fixed to both sides of the base mounting plate 7 as an auxiliary support structure for the workpiece, further enhancing positioning stability. Subsequently, according to the size of the welded pipe, the sliding adjustment block 6 moves the first pipe welding positioning mounting block 41 and the second pipe welding positioning mounting block 42 to the appropriate position along the guide rail structure and locks them with bolt fasteners. This aligns the arc-shaped positioning grooves on the first pipe welding positioning part 31 and the second pipe welding positioning part 32 with the welding interface of the workpiece. The wear-resistant metal material inside the arc-shaped grooves can adapt to different pipe diameters and reduce wear. At this point, the operator places the workpiece to be welded between the contour positioning post and the positioning block. Clamping force is applied using the first quick clamp 51 and the second quick clamp 52 of the lever-type quick clamp. The clamp arms press against the workpiece surface through rubber pads, ensuring even distribution of clamping force without damaging the workpiece. After welding, the quick clamps are released, the sliding adjustment block 6 is used to adjust the position of the welding positioning mounting block, and the operation is repeated with a different workpiece.
[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. A positioning fixture for chamfering and welding inside a water pipe, characterized in that, It includes a base mounting plate (7), a first workpiece contour positioning column (11), a second workpiece contour positioning column (12), two workpiece positioning blocks (2), a first pipe welding positioning part (31), a second pipe welding positioning part (32), a first pipe welding positioning mounting block (41), a second pipe welding positioning mounting block (42), a first quick clamp (51), a second quick clamp (52), and an adjustment block (6); The first workpiece contour positioning column (11), the second workpiece contour positioning column (12) and the workpiece positioning block (2) are fixedly installed on the base mounting plate (7) for contour positioning and auxiliary positioning of the workpiece; The first pipe welding positioning mounting block (41) and the second pipe welding positioning mounting block (42) are fixedly mounted on the base mounting plate (7), and the first pipe welding positioning part (31) and the second pipe welding positioning part (32) are respectively installed for positioning the welding pipe; The first quick clamp (51) and the second quick clamp (52) are disposed on the corresponding workpiece positioning block (2) for clamping and fixing the workpiece.
2. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The end shapes of the first workpiece contour positioning post (11) and the second workpiece contour positioning post (12) match the inner chamfer shape of the workpiece.
3. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, Both the first workpiece contour positioning post (11) and the second workpiece contour positioning post (12) are provided with positioning surfaces that are adapted to the shape of the workpiece, which are used to restrict the movement of the workpiece.
4. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The first pipe welding positioning part (31) and the second pipe welding positioning part (32) are respectively provided with arc-shaped positioning grooves for accommodating and positioning the welding pipe.
5. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The first pipe welding positioning mounting block (41) and the second pipe welding positioning mounting block (42) are slidably mounted on the base mounting plate (7) by means of the adjusting block (6) and are fixed in position by bolt fasteners.
6. The water pipe chamfering welding positioning fixture according to claim 5, characterized in that, The adjustment block (6) is located between the first pipe welding positioning mounting block (41) or the second pipe welding positioning mounting block (42) and the base mounting plate (7), and the adjustment block (6) adopts a guide rail structure.
7. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The first quick clamp (51) and the second quick clamp (52) are lever-type quick clamps, including clamping arms and clamping parts, for quickly clamping and releasing workpieces.
8. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The base mounting plate (7) is provided with multiple threaded holes or mounting grooves for fixing the first workpiece contour positioning column (11), the second workpiece contour positioning column (12), the workpiece positioning block (2), the first pipe welding positioning mounting block (41), and the second pipe welding positioning mounting block (42) by bolts.
9. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The first workpiece contour positioning column (11), the second workpiece contour positioning column (12) and the workpiece positioning block (2) are symmetrically arranged with respect to the central axis of the base mounting plate (7).
10. The water pipe chamfering welding positioning fixture according to claim 1, characterized in that, The first tube welding positioning part (31) and the second tube welding positioning part (32) are made of wear-resistant metal material.