A straightening guide device for cold rolling of reinforcing steel

Abstract

This utility model relates to the field of cold rolling processing technology for reinforcing bars, specifically a straightening and guiding device for cold rolling processing of reinforcing bars. It includes a base, a fixed column on the base, a lifting column on the fixed column, a lifting adjustment structure between the lifting column and the fixed column, a support beam at the top of the lifting column, a mounting frame on the support beam, a horizontal movement adjustment structure between the mounting frame and the support beam, a mounting shaft on the mounting frame via bearings, a drive motor on the mounting frame, and a bottom guide roller on the mounting shaft via bearings. Two sets of side guide rollers are symmetrically arranged at the top of the bottom guide rollers, and a reverse synchronous drive structure is provided between the side guide rollers and the mounting shaft. This utility model can flexibly realize the conveying and guiding of reinforcing bars during the cold rolling process, improving the linear conveying effect of reinforcing bars during cold rolling.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling processing technology of steel bars, specifically a straightening and guiding device for cold rolling processing of steel bars. Background Technology

[0002] Cold rolling of reinforcing bars is a process in which hot-rolled reinforcing bars are subjected to pressure through a rolling mill at room temperature, causing them to undergo plastic deformation and thus improving their mechanical properties. This process can increase the strength, hardness, and surface finish of the reinforcing bars, while reducing their cross-sectional dimensions. Cold-rolled reinforcing bars have higher yield strength and tensile strength, but their plasticity is somewhat reduced. This process is commonly used to produce high-strength threaded steel bars and cold-rolled ribbed steel bars, and is widely used in construction, bridges, and other engineering fields, effectively saving steel consumption and improving structural safety.

[0003] During the cold rolling process of reinforcing bars, due to the long conveyor line and the plastic deformation caused by the cold rolling process, straightening and guiding devices must be installed at the feed and discharge ends of the equipment to ensure the straight conveying of the reinforcing bars.

[0004] Although Chinese patent CN216027065U proposes a guiding scheme based on a pallet and a movable baffle, the design has obvious limitations: First, the plate-type sliding contact structure it adopts will cause continuous friction between the surface of the steel bar and the baffle, which not only aggravates the wear of the steel bar surface, but may also affect the conveying stability due to frictional resistance.

[0005] Secondly, the guiding accuracy of fixed plate structures is limited, making it difficult to effectively suppress the radial runout of steel bars during high-speed transportation, especially for high-strength steel bars, where the straightening effect is poor.

[0006] In addition, the baffle adjustment mechanism of this patent uses manual bolt fastening and toothed engagement to adjust the guide height and range. The operation is cumbersome and it is difficult to ensure the symmetry of the two baffles. Moreover, the accuracy is poor and it is easy to cause the steel bars to deviate. Utility Model Content

[0007] The purpose of this utility model is to provide a straightening and guiding device for cold rolling of reinforcing bars to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a straightening and guiding device for cold-rolled steel bars, comprising a base, a fixed column on the base, a lifting column on the fixed column, a lifting adjustment structure between the lifting column and the fixed column, a support beam at the top of the lifting column, a mounting frame on the support beam, a horizontal movement adjustment structure between the mounting frame and the support beam, a mounting shaft on the mounting frame via bearings, a drive motor on the mounting frame, the drive motor being connected to the mounting shaft, a bottom guide roller on the middle of the mounting shaft via bearings, two sets of side guide rollers symmetrically arranged at the top of the bottom guide roller, and a reverse synchronous drive structure between the side guide rollers and the mounting shaft.

[0009] The present invention is further configured such that the reverse synchronous drive structure includes a drive block, the mounting shaft is provided with reverse drive threads on both sides of the bottom guide roller, the drive block is sleeved on the mounting shaft and threadedly engaged with the drive threads, a guide frame is provided on the top of the drive block, and the side guide rollers are mounted on the tail end of the guide frame through bearings. When the drive motor is started, the mounting shaft can be rotated by the drive motor. The drive block can be controlled to drive the guide frame to move in reverse synchronously on the mounting frame by the threaded connection between the drive threads on the mounting shaft and the drive block, and the movement limit relationship between the moving groove and the moving slide rail. This allows the two sets of side guide rollers to move closer or further apart on the bottom guide roller, thereby better adapting to different sizes and models of steel bars and providing a new and flexible guide limit for steel bars of different sizes.

[0010] The present invention is further configured such that a movable groove is provided at the bottom end of the driving block, and a movable slide rail is provided on the mounting frame. The driving block is slidably mounted on the movable slide rail through the movable groove. When the driving block moves on the mounting frame, it can be limited by the cooperation between the movable groove and the movable slide rail, thereby improving the movement stability of the driving block.

[0011] The present invention is further configured such that the bottom end of the side guide roller is hemispherical, and the side wall of the side guide roller is inclined to form a guide slope. The guide slope is tangent to the bottom end of the hemispherical side guide roller. The cooperation between the bottom of the hemispherical shape and the guide slope can better control the contact and positioning of the side guide roller with steel bars of different sizes. The two sets of inclined and symmetrically arranged guide slopes can effectively limit the radial movement of steel bars during cold rolling conveying, improve the guiding stability of steel bars during cold rolling conveying, and improve the flexibility of use.

[0012] The present invention is further configured such that the lifting and adjusting structure includes a lifting groove, which is opened downward from the top of the fixed column. An electric push rod is provided in the lifting column groove. The bottom end of the lifting column is slidably located in the lifting groove and connected to the top output end of the electric push rod. When the electric push rod is activated, the lifting column is moved in the lifting groove by controlling the electric push rod, thereby realizing the lifting and adjusting of the support beam, and then realizing the lifting and adjusting of the mounting frame located on the support beam, thereby realizing the lifting and adjusting of the bottom guide roller and the side guide roller located on the mounting frame. In this way, the support height of the bottom guide roller can be flexibly adjusted according to the height of the feed and discharge ports of the steel bar cold rolling equipment, so that the bearing surface of the bottom guide roller is level with the feed or discharge port of the matching steel bar cold rolling equipment.

[0013] The present invention is further configured such that the horizontal movement adjustment structure includes a ball screw, which is mounted on a support beam via a bearing seat. A screw nut is mounted on the ball screw, and a screw motor is mounted on the support beam. The screw motor is connected to the ball screw via a transmission. When the screw motor is started, it controls the operation of the ball screw, allowing the screw nut to drive the mounting frame to move horizontally on the support beam. This ensures that the limiting range formed by the bottom guide roller and the side guide roller on the mounting frame matches the inlet and outlet positions of the steel bar cold rolling equipment, achieving straightening and guiding conveying during the feeding and discharging of the steel bars during the cold rolling process, and preventing bending of the steel bars due to cold rolling deformation during conveying.

[0014] The present invention is further provided with a reinforcing rib at the top of the lifting column, and the top of the reinforcing rib is connected to the bottom of the support beam, thereby improving the support stability of the lifting column for the support beam.

[0015] The present invention is further provided with flexible protective covers on both sides of the ball screw nut and the drive block. The flexible protective covers are sleeved on the outside of the ball screw and the drive thread. The present invention achieves protection for the ball screw and the drive thread during operation through the stretchable and foldable performance of the flexible protective covers.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Highly flexible adjustability

[0018] This invention uses an electric push rod to control the lifting column's movement within a fixed column, achieving overall height adjustment of the support beam and mounting frame, ensuring precise matching of the bottom guide rollers to the inlet / outlet height of the cold rolling equipment. The horizontal movement adjustment structure employs ball screw transmission, with a screw motor driving the mounting frame to move laterally, ensuring the guide roller centerline is aligned with the equipment axis. The reverse synchronous drive structure uses a bidirectional threaded shaft to drive the symmetrical movement of the guide rollers on both sides, forming an adjustable limiting space to accommodate different specifications of rebar within a certain range. This three-dimensional adjustment mechanism solves the problem of traditional guiding devices being incompatible with multiple rebar specifications, offering high adjustment accuracy and ease of use.

[0019] 2. Optimized rolling friction guiding system

[0020] This invention employs a combination structure of a bottom guide roller and two side guide rollers, all three connected by bearings. When a reinforcing bar passes through, the guide rollers rotate synchronously with the bar, changing sliding friction to rolling friction and effectively reducing the coefficient of friction. The side guide rollers are designed with a hemispherical bottom end and an inclined guide surface, forming a progressive clamping zone that avoids scratching the surface of the reinforcing bar and effectively suppresses radial runout. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a steel bar cold rolling straightening and guiding device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure and operation of this utility model;

[0023] Figure 3 This is a cross-sectional schematic diagram of the cooperation structure between the fixed column and the lifting column in this utility model;

[0024] Figure 4 This is a schematic diagram of the cooperation structure between the side guide roller and the bottom guide roller on the mounting frame in this utility model;

[0025] Figure 5 This is a cross-sectional schematic diagram of the cooperation structure between the side guide roller and the bottom guide roller on the mounting frame in this utility model;

[0026] Figure 6 This is a cross-sectional schematic diagram of the driving structure of the driving block in this utility model.

[0027] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Fixed column; 3. Lifting column; 4. Support beam; 5. Mounting bracket; 6. Mounting shaft; 7. Drive motor; 8. Bottom guide roller; 9. Side guide roller; 10. Drive block; 11. Drive thread; 12. Guide frame; 13. Moving groove; 14. Moving slide rail; 15. Guide slope; 16. Lifting groove; 17. Electric push rod; 18. Ball screw; 19. Screw nut; 20. Screw motor; 21. Reinforcing rib; 22. Flexible protective cover. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This utility model provides a technical solution: Please refer to Figures 1-6 A straightening and guiding device for cold-rolled steel bars includes a base 1, a fixed column 2 on the base 1, a lifting column 3 on the fixed column 2, a lifting adjustment structure between the lifting column 3 and the fixed column 2, a support beam 4 at the top of the lifting column 3, a mounting frame 5 on the support beam 4, a horizontal movement adjustment structure between the mounting frame 5 and the support beam 4, a mounting shaft 6 on the mounting frame 5 via bearings, a drive motor 7 on the mounting frame 5, the drive motor 7 being connected to the mounting shaft 6, a bottom guide roller 8 on the middle of the mounting shaft 6 via bearings, two sets of side guide rollers 9 symmetrically arranged at the top of the bottom guide roller 8, and a reverse synchronous drive structure between the side guide rollers 9 and the mounting shaft 6.

[0030] The reverse synchronous drive structure includes a drive block 10. The mounting shaft 6 is located on both sides of the bottom guide roller 8 and has reverse drive threads 11. The drive block 10 is sleeved on the mounting shaft 6 and threadedly engaged with the drive threads 11. A guide frame 12 is provided on the top of the drive block 10. The side guide rollers 9 are mounted on the tail end of the guide frame 12 through bearings. When the drive motor 7 is started, the mounting shaft 6 can be rotated. The drive block 10 can drive the guide frame 12 to move synchronously in the opposite direction on the mounting frame 5 through the threaded connection between the drive threads 11 on the mounting shaft 6 and the drive block 10, and the movement limit relationship between the moving groove 13 and the moving slide rail 14. This allows the drive block 10 to drive the guide frame 12 to move synchronously in the opposite direction on the mounting frame 5, so that the two sets of side guide rollers 9 can move closer or further away from each other on the bottom guide roller 8. This can better adapt to different sizes of steel bars and provide a new and flexible guide limit for steel bars of different sizes.

[0031] Please see Figures 1-6 As one implementation of the drive block 10: a moving groove 13 is provided at the bottom of the drive block 10, and a moving slide rail 14 is provided on the mounting frame 5. The drive block 10 is slidably mounted on the moving slide rail 14 through the moving groove 13. When the drive block 10 moves on the mounting frame 5, it can be limited by the cooperation of the moving groove 13 and the moving slide rail 14, thereby improving the movement stability of the drive block 10.

[0032] Please see Figures 1-6 As one embodiment of the side guide roller 9: the bottom end of the side guide roller 9 is hemispherical, and the side wall of the side guide roller 9 is inclined to form a guide slope 15. The guide slope 15 is tangent to the bottom end of the hemispherical side guide roller 9. The cooperation between the hemispherical bottom and the guide slope 15 can better control the contact and positioning of the side guide roller 9 with steel bars of different sizes. The two sets of inclined and symmetrically arranged guide slopes 15 can effectively limit the upward movement of steel bars during cold rolling. In cooperation with the bottom guide roller 8, a stable three-point limiting structure can be formed, which improves the guiding stability during conveying and improves the flexibility of use.

[0033] Please see Figures 1-6 As one implementation of the lifting and adjusting structure: the lifting and adjusting structure includes a lifting groove 16, which is opened downward from the top of the fixed column 2. An electric push rod 17 is installed in the groove of the lifting column 3. The bottom end of the lifting column 3 slides in the lifting groove 16 and is connected to the top output end of the electric push rod 17. When the electric push rod 17 is activated, the lifting column 3 is moved in the lifting groove 16 by the electric push rod 17, thereby realizing the lifting and adjusting of the support beam 4, and then realizing the lifting and adjusting of the mounting frame 5 located on the support beam 4, thereby realizing the lifting and adjusting of the bottom guide roller 8 and the side guide roller 9 located on the mounting frame 5. In this way, the support height of the bottom guide roller 8 can be flexibly adjusted according to the height of the feed and discharge ports of the steel bar cold rolling equipment, so that the bearing surface of the bottom guide roller 8 is level with the feed or discharge port of the matching steel bar cold rolling equipment.

[0034] Please see Figures 1-6As one implementation of the horizontal movement adjustment structure: the horizontal movement adjustment structure includes a ball screw 18, which is mounted on the support beam 4 via a bearing seat. A screw nut 19 is mounted on the ball screw 18. A screw motor 20 is mounted on the support beam 4, and the screw motor 20 is connected to the ball screw 18 for transmission. When the screw motor 20 is started, it controls the operation of the ball screw 18, so that the screw nut 19 can drive the mounting frame 5 to move horizontally on the support beam 4. This makes the limiting range formed by the bottom guide roller 8 and the side guide roller 9 on the mounting frame 5 match the positions of the feed and discharge ports of the steel bar cold rolling equipment, realizing straightening during the feeding and discharging of the steel bar during the cold rolling process, and avoiding bending of the steel bar due to cold rolling deformation during the transportation process.

[0035] Please see Figures 1-6 As one implementation of the lifting column 3: the top of the lifting column 3 is provided with a reinforcing rib 21, the top of the reinforcing rib 21 is connected to the bottom of the support beam 4, and the supporting stability of the lifting column 3 on the support beam 4 is improved by the reinforcing rib 21.

[0036] This utility model provides flexible protective covers 22 on both sides of the lead screw nut 19 and the drive block 10. The flexible protective covers 22 are sleeved on the outside of the ball screw 18 and the drive thread 11. This utility model achieves protection for the ball screw 18 and the drive thread 11 during operation through the stretchable and foldable performance of the flexible protective covers 22. The flexible protective covers 22 adopts a corrugated tube structure.

[0037] In summary, the working principle and specific workflow of this utility model are as follows:

[0038] This utility model is installed as a whole at the feeding end and the discharging end of an existing cold rolling equipment for steel bars by means of a base 1 and ground nails and other components;

[0039] After installation, the guide height and position of the bottom guide roller 8 can be flexibly adjusted according to the feeding and discharging positions;

[0040] In this process, firstly, the electric push rod 17 is activated, and the lifting column 3 is moved in the lifting groove 16 by the electric push rod 17, thereby realizing the lifting and adjustment of the support beam 4, and then realizing the lifting and adjustment of the mounting frame 5 located on the support beam 4, thereby realizing the lifting and adjustment of the bottom guide roller 8 and the side guide roller 9 located on the mounting frame 5. In this way, the support height of the bottom guide roller 8 can be flexibly adjusted according to the height of the feed and discharge ports of the steel bar cold rolling equipment, so that the bearing surface of the bottom guide roller 8 is level with the feed or discharge port of the matching steel bar cold rolling equipment.

[0041] Then, start the lead screw motor 20, and control the ball screw 18 to run through the lead screw motor 20, so that the lead screw nut 19 can drive the mounting frame 5 to move horizontally on the support beam 4, so that the middle part of the bottom guide roller 8 located on the mounting frame 5 matches the middle axis of the feed port and discharge port of the existing steel bar cold rolling equipment, so that the steel bars input and output from the steel bar cold rolling equipment can stably slide past the top middle position of the bottom guide roller 8.

[0042] Then, start the drive motor 7. The drive motor 7 can control the rotation of the mounting shaft 6. Through the threaded connection between the drive thread 11 on the mounting shaft 6 and the drive block 10, and the movement limit relationship between the moving groove 13 and the moving slide rail 14, the drive block 10 can be controlled to drive the guide frame 12 to move synchronously in the opposite direction on the mounting frame 5. This makes the two sets of side guide rollers 9 move closer or further away from each other on the bottom guide roller 8, so that the two sets of side guide rollers 9 and the bottom guide roller 8 form a limit space for the cold rolling of steel bars. By controlling the movement of the side guide rollers 9, this limit space can be flexibly adjusted, so as to better adapt to different steel bar sizes and models, and provide a new and flexible guide limit for steel bars of different sizes.

[0043] During this process, since the bottom guide roller 8 is mounted on the mounting shaft 6 through bearings and the side guide roller 9 is mounted on the guide frame 12 through bearings, when the steel bar slides through the limiting space formed by the bottom guide roller 8 and the side guide roller 9, the bottom guide roller 8 and the side guide roller 9 will rotate synchronously, changing the sliding friction in the prior art to rolling friction, which greatly reduces the friction loss of the steel bar during the cold rolling process. At the same time, it keeps the steel bar in a straight state during the cold rolling process and improves the conveying and guiding effect.

[0044] Furthermore, the combination of the hemispherical bottom and the guide slope 15 can better control the contact and positioning of the side guide roller 9 with steel bars of different sizes. The two sets of inclined and symmetrically arranged guide slopes 15 can effectively limit the radial movement of steel bars during cold rolling and improve the guiding stability during conveying.

[0045] In this utility model, the operation of related electrical components such as motors and electric push rods can be controlled by a PLC control system according to a set program. The specific working process and working principle of this utility model have been described in detail. Based on the above working process and working principle, those skilled in the art should know the specific circuit connection relationship and implement it through existing technology. Furthermore, the circuit connection relationship between related electrical components and the specific driver program are not the subject of protection of this utility model, and this utility model will not elaborate on them.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A straightening and guiding device for cold-rolled steel bars, comprising a base (1), characterized in that: A fixed column (2) is provided on the base (1), a lifting column (3) is provided on the fixed column (2), a lifting adjustment structure is provided between the lifting column (3) and the fixed column (2), a support beam (4) is provided at the top of the lifting column (3), a mounting frame (5) is provided on the support beam (4), a horizontal movement adjustment structure is provided between the mounting frame (5) and the support beam (4), a mounting shaft (6) is provided on the mounting frame (5) through a bearing, a drive motor (7) is provided on the mounting frame (5), the drive motor (7) is connected to the mounting shaft (6) through a transmission, a bottom guide roller (8) is provided in the middle of the mounting shaft (6) through a bearing, two sets of side guide rollers (9) are symmetrically provided at the top of the bottom guide roller (8), and a reverse synchronous drive structure is provided between the side guide rollers (9) and the mounting shaft (6).

2. The straightening and guiding device for cold-rolled steel bars according to claim 1, characterized in that: The reverse synchronous drive structure includes a drive block (10), the mounting shaft (6) is provided with drive threads (11) on both sides of the bottom guide roller (8), the drive block (10) is sleeved on the mounting shaft (6) and threadedly engaged with the drive threads (11), the top of the drive block (10) is provided with a guide frame (12), and the side guide roller (9) is mounted on the tail end of the guide frame (12) by a bearing.

3. The straightening and guiding device for cold-rolled steel bars according to claim 2, characterized in that: The bottom end of the drive block (10) is provided with a moving groove (13), and the mounting bracket (5) is provided with a moving slide rail (14). The drive block (10) is slidably mounted on the moving slide rail (14) through the moving groove (13).

4. The straightening and guiding device for cold-rolled steel bars according to claim 1, characterized in that: The bottom end of the side guide roller (9) is hemispherical, and the side wall of the side guide roller (9) is inclined to form a guide slope (15), which is tangent to the bottom end of the hemispherical side guide roller (9).

5. The straightening and guiding device for cold-rolled steel bars according to claim 1, characterized in that: The lifting adjustment structure includes a lifting groove (16), which is opened downward from the top of the fixed column (2). An electric push rod (17) is provided in the lifting groove (16). The bottom end of the lifting column (3) is slidably located in the lifting groove (16) and connected to the top output end of the electric push rod (17).

6. The straightening and guiding device for cold-rolled steel bars according to claim 2, characterized in that: The horizontal movement adjustment structure includes a ball screw (18), which is mounted on a support beam (4) via a bearing seat. A screw nut (19) is mounted on the ball screw (18), and a screw motor (20) is provided on the support beam (4). The screw motor (20) is connected to the ball screw (18) in a transmission manner.

7. The straightening and guiding device for cold-rolled steel bars according to claim 1, characterized in that: The top of the lifting column (3) is provided with a reinforcing rib (21), and the top of the reinforcing rib (21) is connected to the bottom of the support beam (4).

8. A straightening and guiding device for cold-rolled steel bars according to claim 6, characterized in that: Flexible protective covers (22) are provided on both sides of the lead screw nut (19) and the drive block (10), and the flexible protective covers (22) are sleeved on the outside of the ball screw (18) and the drive thread (11).

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