Pipe fitting shaping mechanism
By using an upper wheel and a tilting lower wheel combined with a spring during the tube manufacturing process, the problem of lower wheel imprint marks was solved, achieving weld smoothness and dimensional control, and improving the quality of the finished tube.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOLONG ANHUI AUTO PARTS
- Filing Date
- 2025-03-10
- Publication Date
- 2026-05-19
AI Technical Summary
In the traditional tube manufacturing process, the lower roller leaves an imprint on the inner wall of the tube, resulting in uneven flattening of the weld seam, causing bulging or deformation at the rolled edge of the product, which affects product quality.
A pipe forming mechanism is adopted, including an upper wheel and two inclined lower wheels. Combined with springs and bearing connecting rods, the upper wheel can move relative to the lower wheel. The elastic force of the spring compensates for the pressure on the weld, avoiding indentation marks and dimensional deviations.
This effectively avoids the imprint marks left by the lower roller on the inner wall of the pipe, ensures a smooth weld, prevents product scrap and rework, and improves pipe manufacturing quality.
Smart Images
Figure CN224253899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe manufacturing technology, and more specifically to a pipe shaping mechanism. Background Technology
[0002] See Figure 1 Traditional pipe manufacturing uses two rollers, one above and one below, to handle the excess weld height on both the inner and outer seams. The upper roller is called the upper roller, and the lower roller is called the lower roller. The weld is leveled and the rollers are aligned on the same plane through upward and downward pressure and rolling. However, this method often encounters problems in practice. (See also...) Figure 2 , Figure 3 Because the hardness of the pipe weld is higher than that of the base material, when the upper and lower molds are subjected to force and the weld is flattened, the lower mold and the inner wall of the pipe are left with deep, tactile mold marks.
[0003] Uneven force during edge rolling can cause bulging at the edge, where the lower die stamping area fails to meet process requirements, frequently leading to scrap and rework. If the upper and lower dies reduce the force and the weld seam is not pressed evenly, bulging and deformation at the edge weld seam will also fail to meet process requirements, resulting in scrap and rework. Utility Model Content
[0004] The technical problem to be solved by this utility model is how to prevent the lower wheel from leaving imprint marks on the inner wall of the tube.
[0005] This utility model solves the above-mentioned technical problems through the following technical means: a pipe fitting shaping mechanism, including a body seat, an upper wheel that can abut against the weld at the top of the body seat, and two inclined lower wheels at the bottom of the body seat.
[0006] As a preferred technical solution, the upper wheel can also move relative to and away from the lower wheel.
[0007] As a preferred technical solution, a bearing connecting rod is elastically connected inside the main body seat by a spring, and the bearing connecting rod is in rotational cooperation with the upper wheel.
[0008] As a preferred technical solution, the distance between the upper wheel and the center of the body seat is the same as the distance between the lower wheel and the center of the body seat.
[0009] As a preferred technical solution, the two lower wheels are arranged in a figure-eight shape.
[0010] As a preferred technical solution, the included angle between the two lower wheels is 60°.
[0011] As a preferred technical solution, the body seat has a groove adapted to the spring, the inner wall of the groove is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to an upper wheel support block adapted to the bearing connecting rod.
[0012] As a preferred technical solution, a limiting pressure plate is fixedly connected to the top of the main body seat, and the bottom plane of the limiting pressure plate is located above the plane where the top of the bearing connecting rod is located.
[0013] As a preferred technical solution, the upper wheel is located at the top center of the body seat.
[0014] As a preferred technical solution, it also includes an upper horizontal mold and a lower horizontal mold that are abutted against the outside of the tube and are arranged in a vertically opposite manner.
[0015] The beneficial effects of this utility model are as follows:
[0016] (1) In this utility model, by setting two lower wheels, the force on one wheel surface is changed to the force on two wheel surfaces compared to the original one lower wheel, thus avoiding the defects of the lower wheel causing pressure marks on the inner wall of the pipe or the weld not being flattened.
[0017] (2) In this utility model, by setting the spring, the upper wheel can move relative to the lower wheel, so that the elastic force of the spring can be used as the compensating force for pressing the weld seam into place, thus avoiding the problem that the upper wheel cannot press the weld seam when the pipe size exceeds the upper tolerance. Attached Figure Description
[0018] Figure 1 A schematic diagram of the shaping mechanism structure is provided for the background art of this utility model;
[0019] Figure 2 A schematic diagram of the tube-making lower mold structure is provided for the background technology of this utility model;
[0020] Figure 3 The background technology provided for this utility model Figure 2 A partially enlarged structural diagram;
[0021] Figure 4 This is a top view structural diagram provided for an embodiment of the present utility model;
[0022] Figure 5 A cross-sectional structural schematic diagram provided for an embodiment of this utility model;
[0023] Figure 6 A schematic diagram of the body base structure provided in an embodiment of this utility model;
[0024] Figure 7 A schematic diagram of the limiting pressure plate structure provided in the embodiment of this utility model;
[0025] Figure 8 A schematic diagram of the upper wheel support block structure provided in an embodiment of this utility model;
[0026] Figure 9This is a schematic diagram of the connection structure between the upper wheel support block and the spring provided in an embodiment of the present utility model;
[0027] Figure 10 This is a schematic diagram of the upper horizontal mold structure provided in an embodiment of the present utility model;
[0028] Reference numerals: 1. Upper wheel; 2. Bearing connecting rod; 3. Limiting pressure plate; 4. Central shaft; 5. Upper wheel support block; 6. Body seat; 7. Spring; 8. Bearing; 9. Lower wheel; 10. Upper horizontal mold; 11. Lower horizontal mold; 12. Wheel mold mark. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0030] See Figure 4 , Figure 5 A pipe forming mechanism includes an upper wheel 1, a bearing connecting rod 2, a limiting pressure plate 3, a central shaft 4, an upper wheel support block 5, a body seat 6, a spring 7, a bearing 8, a lower wheel 9, an upper horizontal mold 10, and a lower horizontal mold 11. The top of the body seat 6 is rotatably connected to the upper wheel 1, which can abut against the weld. The bottom of the body seat 6 is rotatably connected to two inclined lower wheels 9. The lower wheels 9 are rotatably connected to the body seat 6 through the central shaft 4. The outer side of the central shaft 4 is also fitted with a bearing 8. The outer ring of the bearing 8 is fixed to the lower wheel 9, and the inner ring is fixed to the central shaft 4. The upper wheel 1 can also move relative to, i.e., toward or away from, the lower wheel 9. By setting two inclined lower wheels 9, the force on one wheel surface is transformed into the force on two wheel surfaces compared to the original single lower wheel 9, avoiding the defects of the lower wheel 9 imprinting marks on the inner wall of the pipe or the weld not being flattened.
[0031] See Figure 5 , Figure 6 , Figure 7 , Figure 8 The main body 6 has a groove adapted to the spring 7. The inner wall of the groove is fixedly connected to one end of the spring 7. The other end of the spring 7 is fixedly connected to an upper wheel support block 5 adapted to the bearing connecting rod 2. The upper wheel support block 5 abuts or is fixedly connected to the bearing connecting rod 2. The bearing connecting rod 2 is elastically connected to the main body 6 through the spring 7. The bearing connecting rod 2 and the upper wheel 1 are rotatably engaged. The setting of the spring 7 allows the upper wheel 1 to move relative to the lower wheel 9. The elastic force of the spring 7 serves as a compensating force for the extrusion of the weld seam, avoiding the problem that the upper wheel cannot extrude the weld seam when the pipe size exceeds the upper tolerance.
[0032] See Figure 5 The distance between the center of the upper wheel 1 and the center of the body seat 6 is the same as the distance between the center of the lower wheel 9 and the center of the body seat 6. That is, the outer edges of the upper wheel 1 and the lower wheel 9 are both located on a circle with the center of the body seat 6 as the center and the distance between the outer edge of the upper wheel 1 and the body seat 6 as the radius. Of course, the dimensions of the upper wheel 1 and the lower wheel 9 may not be the same.
[0033] See Figure 5 In this embodiment, the two lower wheels 9 are arranged in a figure-eight shape with an included angle of 60°. Of course, other angles are also possible, such as 15°, 30°, 45°, 90°, etc. The upper wheel 1 is located at the top center of the main body seat 6.
[0034] See Figure 2 , Figure 10 The upper horizontal mold 10 and the lower horizontal mold 11 are respectively abutted against the outside of the tube making and are positioned vertically opposite each other. The upper horizontal mold 10 and the lower horizontal mold 11 can rotate with their axes as the pivot, and can rotate synchronously with the tube making process.
[0035] Working principle: The shaping mechanism is placed inside the tube. The elastic force of the two springs 7 keeps the support block and the upper wheel 1 in constant pressure contact with the inner weld. Regardless of the upper and lower tolerances, the springs 7 always compensate for the force on the upper wheel 1 in contact with the inner weld to flatten the weld. The two lower wheels 9 roll against the inner wall at the bottom of the tube, converting the original single force into two forces. As the tube is made forward, the weld is leveled.
[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A pipe fitting shaping mechanism, characterized in that, The device includes a main body base, with an upper wheel at the top that abuts against the weld seam and two inclined lower wheels at the bottom. The upper wheel can also move relative to the lower wheel. A bearing connecting rod is elastically connected inside the main body base via a spring. The bearing connecting rod rotates with the upper wheel. The distance between the upper wheel and the center of the main body base is the same as the distance between the lower wheel and the center of the main body base. The two lower wheels are arranged in a figure-eight shape.
2. The pipe fitting shaping mechanism according to claim 1, characterized in that, The included angle between the two lower wheels is 60°.
3. The pipe fitting shaping mechanism according to claim 1, characterized in that, The main body has a groove adapted to the spring. The inner wall of the groove is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to an upper wheel support block adapted to the bearing connecting rod.
4. The pipe fitting shaping mechanism according to claim 3, characterized in that, A limiting pressure plate is fixedly connected to the top of the main body seat, and the bottom plane of the limiting pressure plate is above the plane where the top of the bearing connecting rod is located.
5. A pipe fitting shaping mechanism according to claim 1, characterized in that, The upper wheel is located at the top center of the main body seat.
6. The pipe fitting shaping mechanism according to claim 1, characterized in that, It also includes an upper horizontal mold and a lower horizontal mold that are positioned opposite each other on the outside of the tube.