Strip steel leveling device

Abstract

The utility model relates to the field of strip steel processing, in particular to a strip steel leveling device, which comprises a horizontally arranged feeding roller pair, a group of vertical width limiting rollers arranged on the rear side of the feeding roller pair, a horizontal feeding roller group arranged on the rear side of the width limiting rollers, and a group of horizontal first upper concave rollers arranged on the rear side of the feeding roller group. Three groups of horizontal upper convex rollers are sequentially arranged on the rear side of the first upper concave roller, each upper convex roller consists of an upper convex roller and a lower concave roller, three groups of horizontal second upper concave rollers are sequentially arranged on the rear sides of the three groups of upper convex rollers, and the first upper concave roller and the second upper concave rollers respectively consist of an upper concave roller and a lower convex roller. The utility model can solve the problem that the leveling effect is poor when a flat roller is used for leveling strip steel in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of strip steel processing, and specifically to a strip steel leveling device. Background Technology

[0002] The current high-frequency welded pipe manufacturing process typically involves the raw material (steel strip coil) being uncoiled by a hydraulic uncoiler, then sheared and butt-welded by a hydraulic shearing machine. It is then passively leveled by a leveling device on the forming main unit. Subsequent processes include forming, high-frequency welding, deburring, spray cooling, sizing and finishing, length cutting, and pipe bundling. In the high-frequency welded pipe production process, the leveling quality of the steel strip plays a crucial role in the final quality of the welded pipe; therefore, the design of the leveling device is particularly important.

[0003] Existing technologies, such as the strip forming equipment disclosed in CN104399779B, use flat rollers to level the strip, which has significant drawbacks. Flat roller leveling can only achieve preliminary straightening of the strip as a whole, and cannot perform differentiated stress adjustment for local shape defects such as edge waviness, middle waviness, and sickle bends. This can easily lead to stress concentration and generate secondary waves or wrinkles. Furthermore, it is difficult to break through the yield limit of high-strength, thick strips, resulting in low leveling accuracy and high residual internal stress. Utility Model Content

[0004] The present invention aims to provide a strip leveling device to solve the problem that the leveling effect of using flat rollers to level strips in the prior art is not good.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The strip leveling device includes horizontally arranged feeding rollers, a set of vertical width-limiting rollers behind the feeding rollers, a set of horizontal feeding rollers behind the width-limiting rollers, a set of horizontal first concave rollers behind the feeding rollers, three sets of horizontal convex rollers behind the first concave rollers, each convex roller consisting of an upper convex roller and a lower concave roller, and three sets of horizontal second concave rollers behind the three sets of convex rollers, each second concave roller consisting of an upper concave roller and a lower convex roller.

[0007] Preferably, as an improvement, the feeding roller assembly includes four lower flat rollers and three upper flat rollers, with the upper flat rollers staggered above the lower flat rollers, and the four lower flat rollers and three upper flat rollers are used for pressing and feeding the steel strip.

[0008] Preferably, as an improvement, the width of the roller surfaces of the three sets of convex rollers decreases sequentially along the transmission direction.

[0009] Preferably, as an improvement, the width of the roller surface of the three sets of second concave rollers decreases sequentially along the transmission direction.

[0010] Preferably, as an improvement, vertical limiting rollers are provided between the upper convex roller and the second upper concave roller, between the three sets of upper convex rollers, and between the three sets of second upper concave rollers.

[0011] Preferably, as an improvement, the gap between the feed roller group, the first concave roller pair, the convex roller pair, and the second concave roller pair can all be adjusted by an adjustment mechanism.

[0012] Preferably, as an improvement, it also includes a processing table, and the adjusting mechanism includes a roller frame vertically arranged on the processing table, a mounting block slidably arranged on the roller frame, a roller shaft rotatably connected to the mounting block, a screw vertically threadedly connected to the roller frame, the bottom end of the screw rotatably connected to the top of the mounting block, and a locking nut threadedly connected to the screw, the locking nut being located above the roller frame.

[0013] The principles and beneficial effects of this solution:

[0014] 1. This device forms a complete strip leveling system through the orderly coordination of feeding rollers, width-limiting rollers, feeding roller group, first concave rollers, convex rollers, second concave rollers, and limiting rollers. Each component has a clear division of labor, from stable strip conveying and width constraint to gradual and precise leveling, and then to lateral limiting to ensure stable operation, achieving comprehensive control over the flatness and shape accuracy of the strip, significantly improving leveling efficiency and quality.

[0015] 2. This solution is a non-powered drive. After the strip enters the subsequent forming mechanism, it is dragged to force it through the feeding rollers, feed roller group, first upper concave roller, upper convex roller and second upper concave roller of this solution. The feeding rollers are set horizontally. The relative rotation of the two rollers ensures uniform and stable feeding speed and avoids strip twisting or wrinkling caused by uneven feeding. The width limiting roller is arranged vertically behind it to effectively constrain and calibrate the lateral position of the strip and prevent the strip from deviating in subsequent processes. It provides a stable foundation for subsequent leveling operations and reduces plate shape defects caused by position deviation.

[0016] 3. The feeding roller assembly consists of four lower flat rollers and three staggered upper flat rollers. This staggered layout increases the contact area and friction between the strip and the roller surface, making the strip more evenly stressed as it passes through. The upper and lower flat rollers work together, with the lower rollers providing support and the upper rollers pressing down, causing the strip to undergo initial plastic deformation and improving its straightness, laying the foundation for subsequent fine leveling.

[0017] 4. The first set of upper concave rollers consists of an upper concave roller and a lower convex roller, which can apply greater pressure to the edge of the strip, stretching the edge fibers and initially correcting edge waviness defects. All three sets of upper convex rollers consist of an upper convex roller and a lower concave roller. The upper convex roller has a larger diameter in the middle and smaller diameters at both ends, working in conjunction with the lower concave rollers. As the strip passes through, it applies greater pressure to the middle, stretching the central fibers and eliminating defects such as central waviness and overall bending. Furthermore, the width of the three sets of upper convex rollers decreases sequentially along the transmission direction, achieving a transition from coarse straightening to fine straightening, and allowing for refined adjustment of defects in the middle of the strip. The three sets of second upper concave rollers also consist of upper concave rollers and lower convex rollers, working in conjunction with the upper convex rollers. Through multiple reverse bending deformations, they further eliminate residual edge waviness and transverse defects, optimizing the edge stress state. This scheme employs the combination of multiple sets of concave and convex rollers and a decreasing width design, causing the strip to undergo multiple forward and reverse bending cycles, forcing the fibers to undergo full plastic deformation, significantly improving leveling accuracy, effectively reducing residual stress inside the strip, and improving strip shape quality.

[0018] 5. Vertical limiting rollers are installed between the upper convex rollers and the second upper concave rollers, between the three sets of upper convex rollers, and between the three sets of second upper concave rollers. These rollers limit the strip in the left and right directions, ensuring that the strip runs stably along the centerline as it passes through each roller group, preventing deviation or serpentine movement. This effectively avoids problems such as uneven leveling, excessive local deformation, and edge damage caused by strip misalignment, improving the consistency and stability of leveling quality and reducing the scrap rate.

[0019] 6. The roller gaps of the feeding roller assembly, the first concave roller pair, the convex roller pair, and the second concave roller pair can all be adjusted via an adjustment mechanism. By rotating the screw, the mounting block can be moved up and down along the roller frame, thereby precisely adjusting the roller gap. This design can adapt to the leveling needs of strip steel of different thicknesses and materials, significantly improving the versatility and applicability of the device. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the adjustment mechanism in an embodiment of the present invention.

[0022] The reference numerals in the accompanying drawings include: 1. Feeding roller pair; 2. Width limiting roller pair; 3. Feeding roller group; 31. Upper flat roller; 32. Lower flat roller; 4. First upper concave roller pair; 5. Upper convex roller pair; 51. Lower concave roller; 52. Upper convex roller; 6. Limiting roller pair; 7. Second upper concave roller pair; 71. Upper concave roller; 72. Lower convex roller; 8. Strip steel; 9. Roller frame; 91. Mounting block; 92. Roller shaft; 93. Screw; 94. Locking nut. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method:

[0024] Example:

[0025] like Figure 1 As shown, the strip leveling device includes a processing table. A feeding roller pair 1 is horizontally arranged on the processing table. A set of vertical width limiting rollers 2 is arranged behind the feeding roller pair 1 (the rear side in the conveying direction, right side in the figure). A horizontal feeding roller group 3 is arranged behind the width limiting rollers 2. The feeding roller group 3 includes four lower flat rollers 32 and three upper flat rollers 31. The three upper flat rollers 31 are staggered above the lower flat rollers 32. The four lower flat rollers 32 and the three upper flat rollers 31 are used to press and feed the steel strip.

[0026] A set of horizontal first concave rollers 4 is arranged behind the feeding roller group 3. Behind the first concave rollers 4, three sets of horizontal convex rollers 5 are arranged sequentially. Each convex roller 5 consists of an convex roller 52 and a concave roller 51. Behind the three sets of convex rollers 5, three sets of horizontal second concave rollers 7 are arranged sequentially. Both the first and second concave rollers 4 and 7 consist of an convex roller 71 and a convex roller 72. The width of the roller surfaces of the three sets of convex rollers 5 decreases sequentially along the conveying direction, as does the width of the roller surfaces of the three sets of second concave rollers 7. Vertical limiting rollers 6 are arranged between the convex rollers 5 and second concave rollers 7, between the three sets of convex rollers 5, and between the three sets of second concave rollers 7.

[0027] The roller spacing of the feeding roller group 3, the first concave roller pair 4, the convex roller pair 5, and the second concave roller pair 7 can all be adjusted via an adjustment mechanism. Specifically, in conjunction with... Figure 2 As shown, taking the first concave roller 4 as an example, the adjusting mechanism includes two roller frames 9 vertically mounted on the processing table. Only one side of the roller frame 9 is shown in the figure. The two roller frames 9 are arranged opposite each other and are respectively located on both sides of the processing table. Two mounting blocks 91 are slidably mounted on each roller frame 9. A roller shaft 92 is rotatably connected between the two upper mounting blocks 91. This roller shaft 92 is used to mount the upper concave roller 71 of the first concave roller 4. A roller shaft 92 is also rotatably connected between the two lower mounting blocks 91. This roller shaft 92 is used to mount the lower convex roller 72 of the first concave roller 4. A screw 93 is vertically threaded onto the roller frame 9. The bottom end of the screw 93 is rotatably connected to the top of the upper mounting block 91. A locking nut 94 is threaded onto the screw 93 and is located above the roller frame 9.

[0028] Specific implementation process:

[0029] This scheme is a non-powered drive. In actual application, after the strip 8 enters the subsequent forming mechanism, it is dragged to force it through this scheme. Specifically, under the traction of the subsequent forming mechanism, the strip 8 passively passes through the feeding roller 1 by friction. Immediately afterwards, the strip 8 enters the width limiting roller 2, thereby providing lateral constraint on the strip 8 and ensuring that the strip 8 travels along the center line of the device, providing a stable running trajectory for the subsequent leveling process.

[0030] Under the continuous traction of the forming mechanism, the strip steel 8 enters the feeding roller group 3. The roller gap between the four lower flat rollers 32 and the three staggered upper flat rollers 31 of the feeding roller group 3 is set slightly less than the thickness of the strip steel 8 by the adjusting mechanism. Utilizing the drag pressure of the forming mechanism, the strip steel 8 undergoes a certain amount of plastic deformation as it passes through the feeding roller group 3, initially improving the flatness of the strip steel 8. When operating the adjusting mechanism, rotating the screw 93 moves the mounting block 91 up and down, thereby adjusting the roller gap.

[0031] Subsequently, the strip 8 enters the first upper concave roller 4, and the roller gap of the upper concave roller 71 and the lower convex roller 72 is adjusted to a suitable value. Under the drag of the forming mechanism, the strip 8 passes through the first upper concave roller 4. The upper concave roller 71 and the lower convex roller 72 cause the strip 8 to bend upward, stretch the edge fibers, and initially alleviate the edge waviness defect.

[0032] Subsequently, the strip 8 passes through three sets of upper convex rollers 5 in sequence. Each of the three sets of upper convex rollers 5 consists of an upper convex roller 52 and a lower concave roller 51. The upper convex roller 52 has a large diameter in the middle and small diameters at both ends. The lower concave roller 51 cooperates with it to cause the strip 8 to bend downward, stretch the central fibers, and eliminate defects such as central waviness and overall bending. In addition, the width of the roller surface of the three sets of upper convex rollers 5 decreases sequentially along the transmission direction, realizing the transition from coarse straightening to fine straightening and finely adjusting the defects in the middle of the strip 8.

[0033] After being straightened by the upper convex rollers 5, the strip 8 enters the third set of second upper concave rollers 7. Similarly, the roller spacing of the second upper concave rollers 7 is precisely adjusted according to the residual edge waviness and transverse defects of the strip 8. Since the roller surface width of the second upper concave rollers 7 also decreases along the transmission direction, the upper concave rollers 71 apply greater pressure to the edge of the strip 8 as it passes through, further stretching the edge fibers, eliminating residual edge waviness and other transverse defects, and optimizing the stress state of the edge of the strip 8.

[0034] Throughout the leveling process, the width-limiting rollers 2 and the vertical limiting rollers 6 distributed between the upper convex rollers 5 and the second upper concave rollers 7, between the three sets of upper convex rollers 5, and between the three sets of second upper concave rollers 7 continuously limit the strip 8 laterally, preventing the strip 8 from deviating or snaking, and ensuring that the strip 8 always runs stably along the centerline during the leveling process, thereby ensuring the consistency and stability of the leveling quality.

[0035] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A strip leveling device, characterized in that: It includes a horizontally arranged feeding roller pair, a set of vertical width-limiting rollers behind the feeding roller pair, a horizontal feeding roller group behind the width-limiting roller pair, a set of horizontal first concave rollers behind the feeding roller group, three sets of horizontal convex rollers behind the first concave rollers, each convex roller consisting of an upper convex roller and a lower concave roller, and three sets of horizontal second concave rollers behind the three sets of convex rollers, each of the first and second concave rollers consisting of an upper concave roller and a lower convex roller.

2. The strip leveling device according to claim 1, characterized in that: The feeding roller assembly includes four lower flat rollers and three upper flat rollers. The upper flat rollers are staggered above the lower flat rollers. The four lower flat rollers and three upper flat rollers are used to press and feed the steel strip.

3. The strip leveling device according to claim 2, characterized in that: The width of the roller surfaces of the three sets of convex rollers decreases sequentially along the transmission direction.

4. The strip leveling device according to claim 3, characterized in that: The width of the roller surfaces of the three sets of second concave rollers decreases sequentially along the transmission direction.

5. The strip leveling device according to claim 4, characterized in that: Vertical limiting rollers are installed between the upper convex rollers and the second upper concave rollers, between the three sets of upper convex rollers, and between the three sets of second upper concave rollers.

6. The strip leveling device according to claim 5, characterized in that: The gap between the feed roller assembly, the first concave roller pair, the convex roller pair, and the second concave roller pair can all be adjusted by the adjustment mechanism.

7. The strip leveling device according to claim 6, characterized in that: It also includes a processing table, and the adjustment mechanism includes a roller frame vertically set on the processing table, a mounting block slidably set on the roller frame, a roller shaft rotatably connected to the mounting block, a screw vertically threadedly connected to the roller frame, the bottom end of the screw rotatably connected to the top of the mounting block, and a locking nut threadedly connected to the screw, the locking nut being located above the roller frame.

Images