Three-roll vertical roll stand for welding steel pipes
By using a three-roll vertical roller frame structure, and utilizing a drive motor and adjusting screw system, three-point support is achieved and the rebound force is directly offset, which solves the problem of insufficient forming in two-roll vertical roller frames, and improves the forming accuracy of welded pipe production and the service life of the side rollers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG NAIJIA ELECTROMECHANICAL EQUIP CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-07-31
AI Technical Summary
When producing thick-walled or high-strength steel pipes, the two-roll vertical roller frame of the existing welded pipe production line has insufficient rigidity, resulting in insufficient forming. The rebound force causes the rollers to deviate, affecting the forming accuracy.
The three-roll vertical roller frame structure includes a vertical roller support, a support roller body, and a side roller body. The drive motor drives the adjusting screw, adjusting screw nut, and sliding seat to achieve three-point support. The side roller body applies pressure directly from above the point of force application to counteract the rebound force. Together with the support of the middle support roller, it forms a three-point constraint of upper pressure and lower support.
This achieves uniform stress on the steel strip, avoids unilateral deviation, improves forming accuracy, reduces dimensional deviation, and extends the service life of the side roller body.
Smart Images
Figure CN224574995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of vertical roller frame for welding steel pipelines, specifically a three-roll vertical roller frame for welding steel pipelines. Background Technology
[0002] The vertical roller frame in the welded pipe production line is a key equipment component in the forming process of welded pipe production. It is mainly used to form steel strips. During the production of welded pipes, the steel strips, after being uncoiled and leveled, enter the vertical roller frame. The rollers in the vertical roller frame apply pressure to the steel strips, causing them to gradually bend and deform, forming the desired pipe shape.
[0003] Currently, the vertical roller frames used in welded pipe production line forming machines are all two-roller structures with tension plates. Although they have advantages such as simple structure and convenient adjustment, when producing thick-walled steel pipes or high-strength steel pipes, due to their high rigidity, they will generate a strong "rebound force" during the forming process. Since there are only two vertical rollers, the force points are limited, and the load-bearing capacity of the structure itself is limited, causing the upper edge of the roller to be pushed outward by the rebound force, driving the upper edge of the roller to shift outward, resulting in insufficient forming and ultimately affecting the forming accuracy. Therefore, a three-roller vertical roller frame for welded steel pipe lines is needed. Utility Model Content
[0004] The purpose of this invention is to provide a three-roll vertical roller frame for welding steel pipelines to solve the problem of insufficient forming mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-roll vertical roller frame for welding steel pipelines, comprising a vertical roller support, a roller body, a side roller body, and a sliding seat. A roller body is mounted on the central position of the vertical roller support via a roller shaft. Side roller bodies are respectively mounted on the vertical roller supports on both sides of the roller body. A sliding seat is mounted on the outer side of each side roller body. An adjusting screw is mounted inside the vertical roller support below each sliding seat, and an adjusting nut is fitted on the outer side of each adjusting screw. One side of each adjusting nut is connected to the sliding seat. A drive motor is fixed on both sides of the vertical roller support, and the output end of the drive motor is connected to the adjusting screw.
[0006] As a further technical solution of this utility model, a side roller shaft is provided at the central position of the side roller body, and a reserved groove is provided at the bottom of the sliding seat.
[0007] As a further technical solution of this utility model, the bottom ends of the side roller shafts are respectively embedded in the reserved grooves, and both sides of the bottom of the side roller shafts are fixedly connected to the sliding seat by the second fasteners.
[0008] As a further technical solution of this utility model, a side roller fixing plate is provided at the central position of the top of the sliding seat, and the side roller fixing plate is evenly connected to the side roller shaft by the first fastener.
[0009] As a further technical solution of this utility model, each of the vertical roller supports at the end of the adjusting screw away from the drive motor is provided with a bearing seat, and the interior of the bearing seat is connected to the adjusting screw through a deep groove ball bearing.
[0010] As a further technical solution of this utility model, a guide groove is provided in the vertical roller bracket on the side of the adjusting screw away from the sliding seat, and the adjusting screw nut is connected to the guide groove through a guide block.
[0011] As a further technical solution of this utility model, the side roller body is composed of a base and an outer layer. The base is located in the center of the side roller body, and an outer layer is provided on the outside of the base. The base is made of ductile iron.
[0012] As a further technical solution of this utility model, the outer side of the substrate is connected to the outer layer by a high-strength structural adhesive, and the outer layer is made of high-chromium cast iron.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The three-roller vertical roller frame for welding steel pipes is equipped with a vertical roller support, a support roller body, a side roller body, a sliding seat, a drive motor, an adjusting screw, and an adjusting nut. By adding a support roller body at the bottom inside the vertical roller support, a three-point support structure with two sides and a middle is formed, which steadily presses the steel strip on the forming path, making the steel strip more evenly stressed and avoiding the problem of one-sided deviation from the structure. At the same time, the drive motor can drive the adjusting screw to rotate, which in turn causes the adjusting nut to slide along the adjusting screw, thereby driving the sliding seat and the side roller body to adjust their positions. According to the angle of the steel strip opening, the side roller body applies pressure directly from above the two points of force of the steel strip rebound, which can more directly offset the rebound force and effectively solve the shortcomings of insufficient forming of two-roller vertical rollers. By having two sets of side roller bodies apply pressure directly from above the points of force of rebound, combined with the support of the middle support roller body, a three-point constraint of upper pressure and lower support is formed, which can accurately offset the rebound force on both sides of the steel strip, forcing the steel strip to bend along the preset path and avoiding dimensional deviations caused by rebound. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a front view cross-sectional structural diagram of the present invention; Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the cross-sectional structure of the side roller of this utility model; Figure 4 This is a front view schematic diagram of the appearance structure of this utility model; Figure 5 This is a top view schematic diagram of the external structure of this utility model.
[0016] In the diagram: 1. Vertical roller support; 2. Idler roller body; 3. Side roller body; 4. Sliding seat; 5. Drive motor; 6. Idler roller shaft; 7. Side roller shaft; 8. First fastener; 9. Side roller fixing plate; 10. Second fastener; 11. Reserved groove; 12. Deep groove ball bearing; 13. Bearing seat; 14. Adjusting screw; 15. Adjusting nut; 16. Guide block; 17. Guide groove; 18. Matrix; 19. High-strength structural adhesive; 20. Outer layer. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0018] Please see Figure 1-5 An embodiment of this utility model is provided: a three-roll vertical roller frame for welding steel pipelines, including a vertical roller support 1, a roller body 2, a side roller body 3 and a sliding seat 4. The roller body 2 is provided at the center of the vertical roller support 1 through the roller shaft 6, and the side roller body 3 is provided on the vertical roller support 1 on both sides of the roller body 2. After being uncoiled and leveled, the steel strip enters the vertical roller frame along the conveyor line. The main body 2 of the idler roller is located in the center below the steel strip as the initial support point, and the main bodies of the side rollers 3 are located on both sides of the steel strip. At this time, a three-point support structure is formed inside the vertical roller bracket 1, consisting of two side roller bodies 3 and a middle support roller body 2, which is used to support the steel strip, so that the steel strip is pressed steadily on the forming path, making the steel strip more evenly stressed, and structurally avoiding the problem of unilateral deviation. A sliding seat 4 is provided on the outer side of the side roller body 3, and a side roller shaft 7 is provided at the center of the side roller body 3. A reserved groove 11 is provided at the bottom of the sliding seat 4. The bottom ends of the side roller shafts 7 are respectively embedded in the reserved grooves 11, and both sides of the bottom of the side roller shafts 7 are fixedly connected to the sliding seat 4 by the second fasteners 10. The bottom end of the side roller shaft 7 is embedded into the reserved groove 11, and the two sides of the bottom of the side roller shaft 7 are fixedly connected to the sliding seat 4 by the second fastener 10. A side roller fixing plate 9 is provided at the center of the top of the sliding seat 4, and the side roller fixing plate 9 is evenly connected to the side roller shaft 7 by the first fastener 8, thus completing the stable installation of the side roller body 3 and the sliding seat 4. Each vertical roller bracket 1 below the sliding seat 4 is equipped with an adjusting screw 14, and an adjusting nut 15 is sleeved on the outside of each adjusting screw 14. One side of the adjusting nut 15 is connected to the sliding seat 4. Both sides of the vertical roller bracket 1 are fixed with drive motors 5, and the output end of the drive motors 5 is connected to the adjusting screw 14. The output end of the drive motor 5 is connected to the adjusting screw 14. The rotation of the drive motor 5 drives the adjusting screw 14 to rotate. The adjusting screw 14 is located away from the drive motor 5. A bearing seat 13 is installed inside the vertical roller bracket 1. The bearing seat 13 is connected to the adjusting screw 14 through a deep groove ball bearing 12 to ensure the stability of the rotation of the adjusting screw 14. When the adjusting screw 14 rotates, the adjusting nut 15 sleeved on the outside of the adjusting screw 14 slides along the adjusting screw 14, thereby driving the side roller body 3 to adjust its position. Based on the angle of the steel strip opening, the side roller body 3 applies pressure directly from above the two points of force of the steel strip rebound, which can more directly offset the rebound force and effectively solve the shortcomings of insufficient forming of the two vertical rollers. A guide groove 17 is provided in the vertical roller bracket 1 on the side of the adjusting screw 14 away from the sliding seat 4. The adjusting screw nut 15 is connected to the guide groove 17 through the guide block 16, which plays a guiding role and ensures that the adjusting screw nut 15 moves stably along a straight line. The side roller body 3 is composed of a base 18 and an outer layer 20. The base 18 is located in the center of the side roller body 3, and the outer layer 20 is provided on the outside of the base 18. The base 18 is made of ductile iron, which provides tough support, absorbs the impact force during the forming of the steel strip, and prevents the outer layer 20 from cracking due to brittleness. The outer side of the substrate 18 is connected to the outer layer 20 by high-strength structural adhesive 19, and the outer layer 20 is made of high-chromium cast iron, which has high wear resistance and is in direct contact with the steel strip. With its extremely high hardness, it resists continuous friction, which can improve the service life of the side roller body 3 and reduce the impact of frequent replacement of the side roller body 3 on production. By applying pressure directly from above the point of rebound force through two sets of side roller bodies 3, and with the support of the middle idler roller body 2, a three-point constraint of upper pressure and lower support is formed, which can accurately counteract the rebound force on both sides of the steel strip, force the steel strip to bend along the preset path, and avoid dimensional deviations caused by springback. The specific model and specifications of the drive motor 5 need to be determined based on the specifications and parameters of the device. The selection and calculation method is existing technology, so it will not be described in detail here.
[0019] Working principle: In this embodiment, a side roller shaft 7 is set at the center of the side roller body 3. A reserved groove 11 is opened at the bottom of the sliding seat 4. The bottom end of the side roller shaft 7 is embedded in the reserved groove 11, and the two sides of the bottom of the side roller shaft 7 are fixedly connected to the sliding seat 4 by the second fastener 10. At the same time, a side roller fixing plate 9 is set at the center of the top of the sliding seat 4. The side roller fixing plate 9 is connected to the side roller shaft 7 by the first fastener 8, thus completing the stable installation of the side roller body 3 and the sliding seat 4. The steel strip that has been uncoiled and leveled enters the vertical roller frame along the conveyor line. The idler roller body 2 is located at the center below the steel strip as the initial support point, and the side roller body 3 is located on both sides of the steel strip. At this time, a combination of the two side roller bodies 3 and the middle idler roller body is formed inside the vertical roller bracket 1. The three-point support structure of body 2 is used to support the steel strip, ensuring that the steel strip is firmly pressed on the forming path and that the force on the steel strip is more even. This structurally avoids the problem of unilateral offset. The drive motors 5 fixed on both sides of the vertical roller support 1 are activated. The output end of the drive motor 5 is connected to the adjusting screw 14. The rotation of the drive motor 5 drives the adjusting screw 14 to rotate. The end of the adjusting screw 14 away from the drive motor 5 has a bearing seat 13 inside the vertical roller support 1. The bearing seat 13 is connected to the adjusting screw 14 through a deep groove ball bearing 12, ensuring the stability of the adjustment screw 14's rotation. When the adjusting screw 14 rotates, the adjusting nut 15 sleeved on the outside of the adjusting screw 14 slides along the adjusting screw 14. The vertical roller support on the side of the adjusting screw 14 away from the sliding seat 4... A guide groove 17 is provided inside the frame 1. The adjusting nut 15 is connected to the guide groove 17 through the guide block 16. The guide groove 17 and the guide block 16 play a guiding role, ensuring that the adjusting nut 15 moves stably along a straight line. One side of the adjusting nut 15 is connected to the sliding seat 4. The movement of the adjusting nut 15 drives the sliding seat 4 to move, which in turn drives the side roller body 3 to adjust its position. According to the angle of the steel strip opening, the side roller body 3 applies pressure directly above the two points of force of the steel strip rebound, which can more directly offset the rebound force and effectively solve the shortcomings of insufficient forming of the two vertical rollers. The side roller body 3 is composed of a base 18 and an outer layer 20. The base 18 is located in the center of the inside of the side roller body 3 and is made of ductile iron to provide toughness. The outer layer 20 is supported and absorbs the impact force during the forming of the steel strip, preventing it from cracking due to brittleness. The outer side of the base 18 is connected to the outer layer 20 through high-strength structural adhesive 19. The outer layer 20 is made of high-chromium cast iron, which has high wear resistance. It directly contacts the steel strip and resists continuous friction with its extremely high hardness, which can improve the service life of the side roller body 3 and reduce the impact of frequent replacement of the side roller body 3 on production. The two side roller bodies 3 apply pressure directly from above the point of rebound force, and with the support of the middle idler roller body 2, a three-point constraint of upper pressure and lower support is formed, which can accurately counteract the rebound force on both sides of the steel strip, force the steel strip to bend along the preset path, avoid dimensional deviations caused by springback, and complete the forming process of the steel strip.
[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A three-high edger roll stand for welding steel pipes, characterized in that, The system includes a vertical roller support (1), a roller body (2), a side roller body (3), and a sliding seat (4). The roller body (2) is located at the center of the vertical roller support (1) via a roller shaft (6). The roller bodies (3) are located on the vertical roller supports (1) on both sides of the roller body (2). The sliding seats (4) are located on the outer side of the side roller bodies (3). The vertical roller supports (1) below the sliding seats (4) are equipped with adjusting screws (14). The outer side of the adjusting screws (14) is fitted with adjusting nuts (15). One side of the adjusting nuts (15) is connected to the sliding seat (4). The vertical roller supports (1) are fixed with drive motors (5) on both sides. The output end of the drive motors (5) is connected to the adjusting screws (14).
2. A three-high edger roll stand for welding steel pipe lines according to claim 1, characterized in that: The side roller body (3) is provided with a side roller shaft (7) at the center position, and the bottom of the sliding seat (4) is provided with a reserved groove (11).
3. A three-high edger roll stand for welding steel pipe lines according to claim 2, characterized in that: The bottom ends of the side roller shafts (7) are respectively embedded in the reserved grooves (11), and both sides of the bottom of the side roller shafts (7) are fixedly connected to the sliding seats (4) by the second fasteners (10).
4. A three-high edger roll stand for welding steel pipe lines according to claim 1, characterized in that: A side roller fixing plate (9) is provided at the center of the top of the sliding seat (4), and the side roller fixing plate (9) is evenly connected to the side roller shaft (7) by the first fastener (8).
5. A three-high edger roll stand for welding steel pipe lines as defined in claim 1, characterized in that: Each of the vertical roller brackets (1) at the end of the adjusting screw (14) away from the drive motor (5) is provided with a bearing seat (13), and the interior of the bearing seat (13) is connected to the adjusting screw (14) through a deep groove ball bearing (12).
6. A three-high edger roll stand for welding steel pipe lines according to claim 1, characterized in that: The adjusting screw (14) has a guide groove (17) in the vertical roller bracket (1) on the side away from the sliding seat (4), and the adjusting screw nut (15) is connected to the guide groove (17) through the guide block (16).
7. The three-roll vertical roller frame for welding steel pipelines according to claim 1, characterized in that: The side roller body (3) is composed of a base (18) and an outer layer (20). The base (18) is located in the center of the side roller body (3), and the outer layer (20) is provided on the outside of the base (18). The base (18) is made of ductile iron.
8. A three-high edger roll stand for welding steel pipe lines according to claim 7, characterized in that: The outer side of the substrate (18) is connected to the outer layer (20) by a high-strength structural adhesive (19), and the outer layer (20) is made of high-chromium cast iron.