A special device for rolling forming stainless steel seamless pipe
By adjusting the angle of the splicing cylinders and the design of the oblique support columns in the rolling forming device, the problems of forming accuracy and stability of stainless steel seamless pipe rolling equipment have been solved, and the efficient production of high-end pipes has been achieved.
Patent Information
- Application Number
- CN202611332179.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-31
- Publication Date
- 2026-11-06
AI Technical Summary
Existing stainless steel seamless pipe rolling forming equipment suffers from problems such as low forming accuracy, poor stability, poor adaptability, and poor production consistency due to manual adjustment of rolling parameters, making it difficult to meet the production needs of high-end pipes.
An adjustable-angle rolling forming device for splicing cylinders is adopted. Through the design of inclined support columns and limiting pins, the splicing cylinders and rolling jackets are stably installed and their positions are limited, avoiding displacement and improving rolling accuracy and stability.
It improves the forming accuracy and stability of stainless steel seamless tubes, enhances the adaptability of the equipment, ensures uniform cooling and surface finish of the tubes, and improves production consistency and yield.
Smart Images
Figure CN123039176A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of stainless steel seamless tube technology, specifically to a special rolling and forming device suitable for stainless steel seamless tubes. Background Technology
[0002] Stainless steel seamless pipes are widely used in petrochemical, nuclear power equipment, high-end equipment manufacturing, and fluid transportation fields due to their corrosion resistance, high temperature resistance, high strength, and excellent sealing properties. Compared with ordinary carbon steel, stainless steel has the characteristics of low plasticity, fast work hardening rate, easy oxidation at high temperatures, and high resistance to rolling deformation, which places extremely high demands on the forming accuracy, stability, and temperature control performance of rolling equipment.
[0003] Existing stainless steel seamless pipe rolling forming equipment has several defects in actual production: First, most rolling equipment adopts a single-stage or two-stage fixed rolling structure, and the rolling roll spacing and rolling pressure cannot be dynamically adjusted. This results in poor adaptability to stainless steel pipes of different diameters and wall thicknesses, easily leading to problems such as uneven wall thickness, excessive ellipticity of the pipe body, and end deformation. The forming accuracy is difficult to meet the standards for high-end pipes. Second, the billet is not precisely preheated during the rolling process. Stainless steel has poor low-temperature plasticity, and direct high-pressure rolling easily leads to internal cracks and excessive residual stress in the pipe, making it prone to cracking during later use. Third, traditional equipment suffers from low mandrel positioning accuracy and poor stability, making the mandrel prone to shifting and shaking during rolling, resulting in uneven inner walls of the pipe and severely affecting its sealing performance and service life. Fourth, the cooling method after rolling is singular, mostly using overall spray cooling, which leads to uneven cooling rates between the inner and outer walls of the pipe, easily causing thermal stress deformation. At the same time, oxide scale is easily formed on the pipe surface, reducing surface smoothness. Finally, existing equipment has a low degree of automation adjustment, and rolling parameters rely on manual adjustment, resulting in poor production consistency and a low yield rate, which cannot meet the needs of large-scale production of high-precision stainless steel seamless pipes.
[0004] Therefore, a special rolling forming device that is adapted to the characteristics of stainless steel, has high precision and strong stability, and is compatible with multiple specifications of pipes can solve many of the drawbacks of existing technologies. Summary of the Invention
[0005] To address the shortcomings of existing rolling forming devices for seamless stainless steel tubes, this invention provides a dedicated rolling forming device for seamless stainless steel tubes. This device features adjustable angles for the splicing cylinder, facilitating the connection and positioning between the splicing cylinder and the rolling jacket. Simultaneously, an inclined support column with an upper tilt angle allows the splicing cylinder to compress the rolling jacket when it is inside the rolling jacket, causing the inclined support column to move outwards. After the splicing cylinder is installed inside the rolling jacket, the inclined support column is confined within it, and the limiting column is also confined within the second seamless tube rolling inclined rod. Rotating the limiting disc pushes a limiting pin to engage inside the limiting column, thus connecting the limiting column and the second seamless tube rolling inclined rod. Furthermore, the positioning pin moves outwards under the elastic force of a spring, confining it within the positioning jacket. This invention solves the problems mentioned in the background art.
[0006] This invention provides the following technical solution: a special device for rolling and forming stainless steel seamless tubes, comprising a seamless tube rolling support main plate, on both sides of the seamless tube rolling support main plate are respectively fixedly connected a seamless tube rolling inclined rod one and a seamless tube rolling inclined rod two. A splicing cylinder is movably sleeved on the outer side of the seamless tube rolling inclined rod one, and a rolling jacket is movably sleeved on the outer side of the splicing cylinder. An outer splicing plate is fixedly connected to the outer side of the rolling jacket, a first spring is installed on the inner side of the outer splicing plate, and an inclined support column is fixedly connected to the inner side of the first spring. A base plate is movably sleeved on the lower part of the rolling jacket, and a positioning threaded rod is fixedly connected to the lower part of the rolling jacket. A nut is threaded onto the outer side of the positioning threaded rod. The lower part of the base plate... A first supporting column is fixedly connected. A press-fit splicing plate is movably sleeved at the lower ends of both ends of the seamless tube rolling diagonal bar. A second supporting column is fixedly connected to the lower part of the press-fit splicing plate. A limiting column is fixedly connected to the outer side of the upper part of the press-fit splicing plate. A limiting disc is movably sleeved at the upper part of both ends of the seamless tube rolling diagonal bar. A limiting pin is fixedly connected to the outer side of the limiting disc. A positioning sleeve is fixedly connected to the upper part of the limiting disc. A spring is movably sleeved inside the upper part of the second supporting column. A positioning pin is fixedly connected to the outer side of the spring. A movable column is fixedly connected to the upper part of the second seamless tube rolling diagonal bar. A second spring is installed inside one side of the first seamless tube rolling diagonal bar. A splicing cylinder limiting pin is fixedly connected to the outer side of the second spring.
[0007] Preferably, the seamless tube rolling support main board, the seamless tube rolling inclined bar one, and the seamless tube rolling inclined bar two are Y-shaped, and grooves are provided inside the seamless tube rolling support main board and the seamless tube rolling inclined bar two.
[0008] Preferably, the splicing cylinder is circular, and a circular groove is formed inside the splicing cylinder. The inclined support column is movably sleeved inside the circular groove. The first spring is clamped between the inclined support column and the outer splicing plate. An inclined groove is formed on the upper part of the inclined support column.
[0009] Preferably, a positioning threaded rod is installed on each side of the lower part of the rolling jacket, the positioning threaded rod passes through the interior of the base plate, and the nut is installed on the lower part of the base plate.
[0010] Preferably, a cylinder is installed at the middle of the connection between the seamless tube rolling inclined rod and the spliced cylinder, and the second spring is clamped between the spliced cylinder limiting pin and the seamless tube rolling inclined rod. The spliced cylinder limiting pin passes through the seamless tube rolling inclined rod and is tightly attached to the outer side of the spliced cylinder.
[0011] Preferably, four limiting pins are installed at equal intervals on the upper part of the limiting disc, and a sliding groove is opened on one side of each of the four limiting pins. The upper part of the limiting post is movably sleeved inside the groove, and the limiting pin is movably sleeved inside the limiting post.
[0012] Preferably, the spring is installed inside the positioning pin and the second support column, and the positioning pin passes through the second support column and is movably sleeved inside the positioning clip.
[0013] Preferably, a press-fit splicing plate is installed at the lower part of both the seamless tube rolling support main plate and the seamless tube rolling diagonal bar II, and the lower parts of the second support column and the first support column are kept on the same horizontal plane.
[0014] Compared with existing specialized rolling and forming equipment for stainless steel seamless tubes, the present invention has the following advantages: 1. This special rolling forming device for stainless steel seamless tubes allows for the adjustment of the angle of the splicing cylinder. This facilitates the alignment and installation between the splicing cylinder and the rolling jacket when the angle of the rolling jacket deviates. When the splicing cylinder is pressed into the interior of the rolling jacket, it pushes the inclined support column to slide outward. After the splicing cylinder is completely confined inside the rolling jacket, the first spring pushes the inclined support column to move inward, thus confining the inclined support column inside the splicing cylinder. This facilitates the pressing and confining of the position between the rolling jacket and the splicing cylinder.
[0015] 2. This special rolling forming device for stainless steel seamless tubes uses a limiting pin installed on the upper part of the limiting disc to engage with the inside of the limiting column. This engages the limiting column with the second seamless tube rolling inclined bar, thus defining the position. At the same time, the positioning pin is pushed outward by the elasticity of the spring, thus limiting the positioning pin with the positioning sleeve. This engages the limiting column with the second seamless tube rolling inclined bar, preventing the position of the second seamless tube rolling inclined bar from shifting from the press-fitting splicing plate. It also provides operational detection and clamping stability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic cross-sectional view of the main body of the present invention; Figure 3 This is a cross-sectional view of the cylindrical limiting device of the present invention; Figure 4 This is a partial cross-sectional view of the sleeve pressing device of the present invention; Figure 5 This is an enlarged structural diagram of point A in the present invention.
[0017] In the diagram: 1. Seamless tube rolling support main board; 2. Seamless tube rolling diagonal bar one; 3. Seamless tube rolling diagonal bar two; 4. Spliced cylinder; 5. Rolling sleeve; 6. Outer splicing plate; 7. First spring; 8. Diagonal support column; 9. Base plate; 10. Positioning threaded rod; 11. Nut; 12. First support column; 13. Press-fit splicing plate; 14. Second support column; 15. Limiting column; 16. Limiting disc; 17. Limiting pin; 18. Positioning sleeve; 19. Spring; 20. Positioning pin; 21. Movable column; 22. Second spring; 23. Spliced cylinder limiting pin. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A special rolling forming device for stainless steel seamless tubes includes a seamless tube rolling support main plate 1. Seamless tube rolling inclined rod 1 2 and seamless tube rolling inclined rod 2 3 are fixedly connected to both sides of the seamless tube rolling support main plate 1. A splicing cylinder 4 is movably sleeved on the outer side of the seamless tube rolling inclined rod 1 2. The angle of the splicing cylinder 4 is adjusted to facilitate alignment and installation between the splicing cylinder 4 and the rolling sleeve 5. The rolling sleeve 5 is movably sleeved on the outer side of the splicing cylinder 4, and the position between the splicing cylinder 4 and the rolling sleeve 5 is press-fitted to limit the splicing position of the splicing cylinder 4. An outer splicing plate 6 is fixedly connected to the outer side of the rolling sleeve 5. The outer splicing plate 6 supports the first spring 7 and the inclined support column. Position 8 provides movement space. A first spring 7 is installed on the inner side of the outer splicing plate 6. The first spring 7 pushes the inclined support column 8 to move inward to provide movement space. The inclined support column 8 is fixedly connected to the inner side of the first spring 7. The inclined support column 8 can be easily snapped into the inside of the splicing cylinder 4. The lower part of the rolling jacket 5 is movably sleeved with a base plate 9. The lower part of the rolling jacket 5 is fixedly connected with a positioning threaded rod 10. The external thread of the positioning threaded rod 10 is connected with a nut 11. The positioning threaded rod 10 passes through the base plate 9, that is, it is spliced at the position between the base plate 9 and the rolling jacket 5. The lower part of the base plate 9 is fixedly connected with a first support column 12. The lower end of the seamless tube rolling inclined rod 3 is movably sleeved with a press-fit splicing plate 13. The press-fitting splicing plate 13 supports and limits the seamless tube rolling diagonal bar 3. A second support column 14 is fixedly connected to the lower part of the press-fitting splicing plate 13. A limiting column 15 is fixedly connected to the outer side of the upper part of the press-fitting splicing plate 13. A limiting disc 16 is movably sleeved on the upper part of the end of the seamless tube rolling diagonal bar 3. Rotating the limiting disc 16 moves the limiting pin 17 to the inside of the limiting column 15. The limiting pin 17 is fixedly connected to the outer side of the limiting disc 16 and engages with the inside of the limiting column 15, thus limiting the position of the limiting column 15. A positioning sleeve 18 is fixedly connected to the upper part of the limiting disc 16. A spring 19 is movably sleeved inside the upper part of the second support column 14. A positioning pin 20 is fixedly connected to the outside of the seamless tube rolling slant 18. A spring 19 pushes the positioning pin 20 to move outward, and the positioning pin 20 is limited inside the positioning sleeve 18. This limits the position between the limiting disc 16 and the seamless tube rolling slant 2 3. A movable column 21 is fixedly connected to the upper part of the seamless tube rolling slant 2 3. The movable column 21 limits the position of the limiting disc 16. A second spring 22 is installed inside one side of the seamless tube rolling slant 2 4. A splicing cylindrical limiting pin 23 is fixedly connected to the outside of the second spring 22. The second spring 22 pushes the splicing cylindrical limiting pin 23 to move outward, and the splicing cylindrical limiting pin 23 passes through the seamless tube rolling slant 2 4 and limits the position of the splicing cylinder 4.
[0020] refer to Figure 1The seamless tube rolling support main board 1, seamless tube rolling inclined bar 1 2, and seamless tube rolling inclined bar 2 3 are Y-shaped. The interior of the seamless tube rolling support main board 1 and seamless tube rolling inclined bar 2 3 is provided with grooves. The Y-shaped shape of the seamless tube rolling support main board 1, seamless tube rolling inclined bar 1 2, and seamless tube rolling inclined bar 2 3 facilitates the support of stainless steel seamless tubes during use. At the same time, the interior of the seamless tube rolling support main board 1 and seamless tube rolling inclined bar 2 3 is provided with grooves, which facilitates the installation of limiting devices inside the grooves.
[0021] refer to Figure 3 The splicing cylinder 4 is circular, with a circular groove inside. The inclined support column 8 is movably fitted inside the circular groove. The first spring 7 is clamped between the inclined support column 8 and the outer splicing plate 6. The upper part of the inclined support column 8 has an inclined groove. The circular shape of the splicing cylinder 4 facilitates its movability inside the rolling sleeve 5 during installation. Furthermore, the inclined groove on the upper part of the inclined support column 8 allows for easy installation of the splicing cylinder 4 inside the rolling sleeve 5. The inclined contact formed between the splicing cylinder 4 and the inner side of the inclined support column 8, and the first spring 7 installed on the outer side of the inclined support column 8, facilitates the outward retraction of the inclined support column 8 when the splicing cylinder 4 is installed inside the rolling sleeve 5. After the position between the splicing cylinder 4 and the rolling sleeve 5 is defined, the inclined support column 8 is locked inside the splicing cylinder 4, and the inclined support column 8 is prevented from moving under the elastic action of the first spring 7. This increases the convenience and stability of the installation of the splicing cylinder 4 and the rolling sleeve 5.
[0022] refer to Figure 3 A positioning threaded rod 10 is installed on each side of the lower part of the rolling jacket 5. The positioning threaded rod 10 passes through the interior of the base plate 9. The nut 11 is installed on the lower part of the base plate 9. By movably connecting the lower part of the rolling jacket 5 to the base plate 9, and movably connecting the positioning threaded rod 10 to the interior of both sides of the base plate 9, by rotating the nut 11, the base plate 9 is fixed at the lower part of the rolling jacket 5. This increases the stability when splicing the position between the rolling jacket 5 and the base plate 9.
[0023] refer to Figure 2A cylinder is installed at the middle of the connection between the seamless tube rolling slant bar 2 and the splicing cylinder 4. A second spring 22 is clamped between the splicing cylinder limiting pin 23 and the seamless tube rolling slant bar 2. The splicing cylinder limiting pin 23 passes through the seamless tube rolling slant bar 2 and is tightly attached to the outside of the splicing cylinder 4. By installing a cylinder at the middle of the connection between the seamless tube rolling slant bar 2 and the splicing cylinder 4, the splicing cylinder 4 is limited to the outside of the seamless tube rolling slant bar 2. At the same time, the splicing cylinder 4 can rotate around the outside of the seamless tube rolling slant bar 2. That is, when the position between the splicing cylinder 4 and the rolling sleeve 5 is spliced, if the installation angle of the rolling sleeve 5 is offset, it is convenient to adjust the angle of the splicing cylinder 4 and convenient to splice and limit the position between the splicing cylinder 4 and the rolling sleeve 5.
[0024] refer to Figure 4 Four limiting pins 17 are evenly spaced on the upper part of the limiting disc 16. Each of the four limiting pins 17 has a groove on one side. The upper part of the limiting post 15 is movably sleeved inside the groove, and the limiting pins 17 are movably sleeved inside the limiting post 15. By installing four limiting pins 17 evenly spaced inside the limiting disc 16, and rotating the limiting disc 16, the limiting pins 17 extend into the interior of the seamless tube rolling inclined bar 2 3. That is, the limiting disc 16 can be moved to one side of the limiting post 15, and the limiting pins 17 can be engaged inside the limiting post 15. Thus, the limiting post 15 can be limited inside the seamless tube rolling inclined bar 2 3, avoiding the problem of positional displacement of the press-fit splicing plate 13.
[0025] refer to Figure 4 Spring 19 is installed inside positioning pin 20 and second support column 14. Positioning pin 20 passes through second support column 14 and is movably sleeved inside positioning sleeve 18. After the limiting disc 16 moves to match the limiting column 15, the positioning sleeve 18 and positioning pin 20 are aligned. At the same time, positioning pin 20 is pushed outward by the elasticity of spring 19, that is, the position between positioning pin 20 and positioning sleeve 18 is spliced and limited, and the position between limiting disc 16 and seamless tube rolling diagonal bar 3 is aligned and installed. Thus, the stability of the position of limiting disc 16 during installation is ensured.
[0026] refer to Figure 1A press-fit splicing plate 13 is installed at the lower part of both the seamless tube rolling support main board 1 and the seamless tube rolling inclined rod 2 3. The lower parts of the second support column 14 and the first support column 12 are kept on the same horizontal plane. By installing the press-fit splicing plate 13 at the lower part of both the seamless tube rolling support main board 1 and the seamless tube rolling inclined rod 2 3, and the press-fit splicing plate 13 can limit the position between the seamless tube rolling support main board 1 and the seamless tube rolling inclined rod 2 3, and the lower parts of the second support column 14 and the first support column 12 are kept on the same horizontal plane, the seamless tube rolling support main board 1, the seamless tube rolling inclined rod 1 2 and the seamless tube rolling inclined rod 2 3 are thus installed as a whole on the stainless steel seamless tube.
[0027] Working principle: In use, the first support column 12 and the second support column 14 are installed behind the stainless steel seamless tube. Simultaneously, the seamless tube rolling support main plate 1 and the seamless tube rolling inclined rod 2 3 are movably sleeved on the upper parts of the two press-fit splicing plates 13. Meanwhile, the limiting column 15 passes through the interior of the seamless tube rolling inclined rod 2 3 and is confined within the groove of the limiting disc 16. Rotating the limiting disc 16 pushes the limiting pin 17 to engage with the inside of the limiting column 15 for confinement. Furthermore, the positioning pin 20, under the elastic action of the spring 19, is confined within the movable column 21. The movable column 21 limits the position of the limiting disc 16, thereby increasing the convenience of installation when the seamless tube rolling support main board 1 and the seamless tube rolling diagonal bar 3 are installed. The angle of the splicing column 4 is adjusted and the splicing column 4 is pressed into the inside of the rolling jacket 5. The splicing column 4 presses against the diagonal support column 8 and moves it outward. After the splicing column 4 and the rolling jacket 5 are spliced, the diagonal support column 8 can be limited inside the splicing column 4. This increases the stability and convenience of installation when the splicing column 4 is installed.
[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A special rolling forming device for stainless steel seamless tubes, comprising a seamless tube rolling support main plate (1), characterized in that: Seamless tube rolling support main plate (1) is fixedly connected to two sides by seamless tube rolling inclined rod one (2) and seamless tube rolling inclined rod two (3). A splicing cylinder (4) is movably sleeved on the outer side of seamless tube rolling inclined rod one (2). A rolling sleeve (5) is movably sleeved on the outer side of the splicing cylinder (4). An outer splicing plate (6) is fixedly connected on the outer side of the rolling sleeve (5). A first spring (7) is installed on the inner side of the outer splicing plate (6). An inclined support column (8) is fixedly connected on the inner side of the first spring (7). A base plate (9) is movably sleeved on the lower part of the rolling sleeve (5). A positioning threaded rod (10) is fixedly connected to the lower part of the rolling sleeve (5). A nut (11) is threaded on the outer side of the positioning threaded rod (10). A first support column (12) is fixedly connected to the lower part of the base plate (9). The lower end of the seamless tube rolling inclined rod two (3) is movably sleeved on the lower part of the rolling sleeve (5). A press-fit splicing plate (13) is movably sleeved, and a second support column (14) is fixedly connected to the lower part of the press-fit splicing plate (13). A limiting column (15) is fixedly connected to the outer side of the upper part of the press-fit splicing plate (13). A limiting disc (16) is movably sleeved at the upper part of the end of the seamless tube rolling diagonal bar two (3). A limiting pin (17) is fixedly connected to the outer side of the limiting disc (16). A positioning sleeve (18) is fixedly connected to the upper part of the limiting disc (16). A spring (19) is movably sleeved inside the upper part of the second support column (14). A positioning pin (20) is fixedly connected to the outer side of the spring (19). A movable column (21) is fixedly connected to the upper part of the seamless tube rolling diagonal bar two (3). A second spring (22) is installed inside one side of the seamless tube rolling diagonal bar one (2). A splicing cylinder limiting pin (23) is fixedly connected to the outer side of the second spring (22).
2. The special rolling forming device for stainless steel seamless tubes according to claim 1, characterized in that: The seamless tube rolling support main board (1), seamless tube rolling inclined bar one (2) and seamless tube rolling inclined bar two (3) are Y-shaped, and grooves are opened inside the seamless tube rolling support main board (1) and seamless tube rolling inclined bar two (3).
3. The special rolling and forming device for stainless steel seamless tubes according to claim 1, characterized in that: The splicing cylinder (4) is circular, and a circular groove is provided inside the splicing cylinder (4). The inclined support column (8) is movably sleeved inside the circular groove. The first spring (7) is clamped between the inclined support column (8) and the outer splicing plate (6). An inclined groove is provided on the upper part of the inclined support column (8).
4. The special rolling and forming device for stainless steel seamless tubes according to claim 1, characterized in that: A positioning threaded rod (10) is installed on each side of the lower part of the rolling sleeve (5). The positioning threaded rod (10) passes through the interior of the base plate (9). The nut (11) is installed on the lower part of the base plate (9).
5. A special rolling forming device for stainless steel seamless tubes according to claim 1, characterized in that: A cylinder is installed at the middle of the connection between the seamless tube rolling inclined bar 1 (2) and the splicing cylinder (4). The second spring (22) is clamped between the splicing cylinder limiting pin (23) and the seamless tube rolling inclined bar 1 (2). The splicing cylinder limiting pin (23) passes through the seamless tube rolling inclined bar 1 (2) and is tightly attached to the outside of the splicing cylinder (4).
6. A special rolling forming device for stainless steel seamless tubes according to claim 1, characterized in that: Four limiting pins (17) are installed at equal intervals on the upper part of the limiting disc (16). Each of the four limiting pins (17) has a groove on one side. The upper part of the limiting post (15) is movably sleeved inside the groove, and the limiting pins (17) are movably sleeved inside the limiting post (15).
7. A special rolling forming device for stainless steel seamless tubes according to claim 1, characterized in that: The spring (19) is installed inside the positioning pin (20) and the second support column (14). The positioning pin (20) passes through the second support column (14) and is movably sleeved inside the positioning sleeve (18).
8. A special rolling forming device for stainless steel seamless tubes according to claim 1, characterized in that: The lower part of the seamless tube rolling support main plate (1) and the seamless tube rolling diagonal bar (3) are both equipped with a press-fit splicing plate (13), and the lower parts of the second support column (14) and the first support column (12) are kept on the same horizontal plane.