Low-abrasion rough rolling centering device and equipment

Abstract

The invention relates to the technical field of rough rolling conveying, in particular to a low-abrasion rough rolling centering device and equipment which comprises a supporting ball, a correcting plate, a driving unit and a linear driver. The supporting balls are arranged in a rectangular array and form a bearing end face, the bearing end face is used for bearing steel, and the supporting balls are in rolling fit with the bottom of the steel. The number of the correcting plates is two, the two correcting plates are arranged on the two sides of the bearing end face correspondingly, rotating rollers are rotationally arranged on the sides, close to each other, of the two correcting plates correspondingly, and the rotating rollers are in rolling fit with the side wall of the steel. The driving unit is arranged above the bearing end face and comprises a driving roller, the driving roller is used for making contact with the upper portion of the steel and driving the steel to move, and the axis of the driving roller is parallel to the arrangement direction of the two correcting plates; and the linear driver is vertically arranged at the upper part of the driving unit. The defects such as scratches and crush damage on the surface of the steel are avoided, and abrasion of the steel to device parts is reduced.

Description

Technical Field

[0001] This invention relates to the field of roughing mill conveying technology, specifically to a low-wear roughing mill centering device and equipment. Background Technology

[0002] In the rough rolling process, the steel needs to be centered to ensure that the steel is in the correct position during rough rolling.

[0003] Chinese Patent Publication No. CN109622633B discloses a method for centering and matching control of hot continuous rolling roughing and finishing mills. The method includes: Step A: determining the overall offset of the intermediate billet within the finishing mill; Step B: without changing the centerline of the roughing mill, the centerline of the finishing mill, and the centerline of the intermediate roller table, setting a side guide plate on the intermediate roller table between the roughing mill and the finishing mill to guide the intermediate billet laterally; the guide surface of the side guide plate is perpendicular to the surface of the intermediate billet; Step C: based on the overall offset of the intermediate billet within the finishing mill, pre-setting the correction amount of the side guide plate, and correcting the intermediate billet, wherein the correction direction of the side guide plate is set to the opposite side of the overall offset within the mill, according to the centerline of the side guide plate.

[0004] The above-mentioned scheme improves the positional correction accuracy of intermediate steel billets, but wear still occurs during the correction process. Traditional centering devices mainly use correction plates on both sides of the steel for correction, and conveyor rollers at the bottom of the steel to support it. When using correction plates for correction, the movement direction of the steel is parallel to the axis of the conveyor rollers. Moreover, the steel in the roughing stage is relatively thick, and the pressure on a single conveyor roller when bearing the steel is relatively large. Therefore, the steel in the correction process will experience relative wear with the outer side of the conveyor rollers, and the wear is quite severe. Summary of the Invention

[0005] To address the aforementioned problems, a low-wear roughing mill centering device and equipment are provided. By comprehensively optimizing the contact method between the steel and the device components to a rolling fit, a significant low-wear effect is achieved. The device uses a rectangular array of support balls to support the bottom of the steel, rotating rollers on the sidewall of the correction plate to contact the side of the steel, and an upper drive roller to adhere to the top surface of the steel. Throughout the centering adjustment and conveying process, all three components maintain a rolling fit with the steel, completely replacing the sliding friction that easily causes severe wear in traditional devices.

[0006] To address the problems of existing technologies, the present invention provides a low-wear roughing mill centering device, comprising a support ball, a correction plate, a drive unit, and a linear actuator;

[0007] The support balls are arranged in a rectangular array to form a receiving end face, which is used to support the steel. The support balls roll in contact with the bottom of the steel.

[0008] There are two correction plates, which are respectively set on both sides of the receiving end face. The two correction plates can be close to each other or far apart. On the side of the two correction plates that are close to each other, there is a rotating roller that is rotatably installed. The rotating roller is in rolling cooperation with the side wall of the steel.

[0009] The drive unit is positioned above the receiving end face. The drive unit includes a drive roller, which is used to contact the upper part of the steel and drive the steel to move. The axis of the drive roller is parallel to the arrangement direction of the two correction plates.

[0010] The linear actuator is vertically mounted on the upper part of the drive unit, and the linear actuator drives the drive unit to move up and down.

[0011] Preferably, the drive unit further includes a first rotary driver and a transmission assembly;

[0012] The first rotary actuator is horizontally positioned on one side of the drive roller;

[0013] The transmission assembly is disposed between the first rotary driver and the drive roller, and the first rotary driver drives the drive roller through the transmission assembly.

[0014] Preferably, the transmission assembly includes a chain and a chain;

[0015] Multiple toothed discs are provided, with one toothed disc at the end of each drive roller. The first rotary driver is used to drive the toothed discs that are not fixedly connected to the drive rollers to rotate.

[0016] The chain is mounted on the crankset and engages with the crankset for transmission.

[0017] Preferably, the transmission assembly further includes a tensioning disc, which is disposed between two toothed discs, each with a drive roller at one end, and a chain is wound around the upper part of the tensioning disc and drives the tensioning disc.

[0018] Preferably, the drive unit further includes a lifting frame, a pressing frame, and a spring;

[0019] The lifting frame is located above the drive roller, and the drive roller is rotatably mounted on the lifting frame.

[0020] The pressing frame is positioned above the lifting frame, with a gap between the lifting frame and the pressing frame. The output end of the linear drive is fixedly connected to the upper part of the pressing frame.

[0021] The spring is vertically installed in the gap, and its two ends are fixedly connected to the lifting frame and the pressing frame, respectively.

[0022] Preferably, a lifting rod is vertically fixed at the upper part of the lifting frame, the lifting rod vertically passes through the pressing frame and slides with the pressing frame.

[0023] Preferably, multiple friction grooves are evenly formed on the outer peripheral sidewall of the drive roller around the axis of the drive roller.

[0024] Preferably, a lead screw is provided on the upper part of the support ball along the arrangement direction of the two correction plates. The lead screw passes through the two correction plates in sequence. The lead screw has two sections of threads with opposite rotation directions, and the two sections of threads are respectively threaded with the two correction plates.

[0025] Preferably, a second rotary driver for driving the lead screw to rotate is provided at one end of the lead screw, and a torque sensor is provided between the second rotary driver and the lead screw.

[0026] The present invention also relates to a low-wear roughing centering device, including a low-wear roughing centering apparatus.

[0027] The advantages of this invention compared to the prior art are:

[0028] 1. This invention significantly reduces wear by optimizing the contact between steel and device components to a rolling fit. The device uses a rectangular array of support balls to support the bottom of the steel, rotating rollers on the sidewall of the correction plate to contact the side of the steel, and an upper drive roller to adhere to the top surface of the steel. Throughout the centering and conveying process, all three maintain a rolling fit with the steel, completely replacing the sliding friction that easily causes severe wear in traditional devices. This avoids scratches, dents, and other defects on the steel surface, reduces wear on device components, and effectively extends the overall service life of the centering device.

[0029] 2. By designing multiple sets of protective and stabilizing components, the reliability and durability of the device operation are significantly improved. The transmission component adopts an indirect transmission method using a sprocket and chain, avoiding direct transmission of high steel temperature to the first rotary drive and preventing damage to the first rotary drive due to overheating; the addition of a tensioning disc prevents chain slippage and reduces additional wear on the sprocket and chain; the spring between the lifting frame and the pressing frame can increase the pressure of the drive roller on the steel through its elasticity, and in conjunction with the friction groove on the outer circumference of the drive roller, effectively prevents slippage during conveying; the lifting rod can prevent deflection during the lifting and lowering of the drive unit, while protecting the spring from excessive tension, further extending the service life of each component.

[0030] 3. By introducing automated detection and precise drive control, alignment efficiency and accuracy are improved, while production and maintenance costs are reduced. Vision sensors automatically detect whether the steel has fully entered the device, and torque sensors accurately determine the timing of alignment completion by monitoring torque values, eliminating the need for manual intervention. The reverse thread design of the lead screw allows the two correction plates to approach or separate synchronously, ensuring alignment accuracy while shortening adjustment time. Low wear characteristics reduce the frequency of component replacement, lowering spare parts procurement and downtime maintenance costs. Simultaneously, it avoids defective products caused by steel wear, reducing waste of raw materials and energy and improving overall production efficiency. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of a low-wear roughing centering device according to the present invention.

[0032] Figure 2 This is an exploded three-dimensional schematic diagram of a low-wear roughing centering device according to the present invention.

[0033] Figure 3 This is a cross-sectional perspective view of a low-wear roughing centering device according to the present invention.

[0034] Figure 4 This invention relates to a low-wear roughing rolling centering device. Figure 3 A magnified view of a portion of point A in the middle.

[0035] Figure 5 This invention relates to a low-wear roughing rolling centering device. Figure 3 A magnified view of a portion of point B in the middle.

[0036] Figure 6 This is a three-dimensional schematic diagram of a low-wear roughing centering device of the present invention after part of the outer shell has been removed.

[0037] Figure 7 This invention relates to a low-wear roughing rolling centering device. Figure 6 A magnified view of a portion of point C.

[0038] Figure 8 This is a three-dimensional schematic diagram of a low-wear roughing centering device of the present invention after removing part of the outer shell and part of the correction plate.

[0039] The following are the labels in the diagram: 1. Support ball; 2. Correction plate; 21. Rotating roller; 22. Lead screw; 23. Second rotary actuator; 3. Drive unit; 31. Drive roller; 311. Friction groove; 32. First rotary actuator; 33. Transmission assembly; 331. Gear plate; 332. Chain; 333. Tensioner plate; 34. Lifting frame; 341. Lifting rod; 342. Protrusion; 35. Pressing frame; 36. Spring; 4. Linear actuator; 5. Steel. Detailed Implementation

[0040] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0041] Reference Figures 1-4 A low-wear roughing mill centering device includes a support ball 1, a correction plate 2, a drive unit 3, and a linear actuator 4;

[0042] The support balls 1 are arranged in a rectangular array to form a receiving end face, which is used to support the steel 5. The support balls 1 and the bottom of the steel 5 are in rolling contact.

[0043] There are two correction plates 2, which are respectively set on both sides of the receiving end face. The two correction plates 2 can be close to each other or far apart. On the side of the two correction plates 2 that are close to each other, a rotating roller 21 is rotatably set. The rotating roller 21 rolls with the side wall of the steel 5.

[0044] The drive unit 3 is located above the receiving end face. The drive unit 3 includes a drive roller 31, which is used to contact the upper part of the steel 5 and drive the steel 5 to move. The axis of the drive roller 31 is parallel to the arrangement direction of the two correction plates 2.

[0045] The linear actuator 4 is vertically mounted on the upper part of the drive unit 3, and the linear actuator 4 drives the drive unit 3 to rise and fall.

[0046] During the centering adjustment process in roughing rolling, the wear problem between steel 5 and the conveyor rollers is not caused by a single factor, but is the result of the combined effects of the device design characteristics, the physical properties of steel 5, and the requirements of the rolling process. Its wear mechanism and impact can be further analyzed from three dimensions. From the perspective of contact state, although the conveyor rollers of traditional centering devices serve the dual functions of support and conveying, the stress state of steel 5 undergoes a fundamental change at the moment of centering adjustment. The lateral thrust applied by the correction plate 2 from both sides disrupts the original stable movement of steel 5 along the axis of the conveyor rollers, causing localized lateral friction between the bottom of steel 5 and the surface of the conveyor rollers. Furthermore, the large thickness and high rigidity of steel 5 in the roughing rolling stage prevent this shear force from being buffered by the deformation of steel 5 itself, concentrating entirely in the contact area. This causes the original rolling friction to instantly transform into sliding friction, significantly increasing the coefficient of friction and leading to severe wear.

[0047] From the perspective of load distribution, the weight of a rough-rolled steel billet can typically reach several tons, and its thickness is often tens of millimeters or more. This requires the conveyor rollers to withstand extremely high pressure per unit area. Before centering adjustment, the weight of the billet is evenly distributed across multiple sets of conveyor rollers, and the load on each individual roller is within a relatively reasonable range. However, when the corrector plate 2 pushes the billet to shift or rotate, the center of gravity of the billet will be temporarily concentrated on a few sets of conveyor rollers, and the local load will instantly double. This concentrated load will cause the conveyor roller surface to undergo slight deformation under sliding friction, forming an irregular contact surface. This not only accelerates the wear of the roller surface but also leaves scratches of varying depths on the bottom of the steel 5. If these scratches are not treated in time, they will be amplified during subsequent rolling, ultimately affecting the surface quality of the finished steel 5.

[0048] From the perspective of the chain reaction of wear consequences, this wear caused by centering adjustment is not isolated, but has a continuous impact on the entire roughing rolling process. On the one hand, after the conveyor roller surface develops pits and thinning on one side due to wear, its conveying accuracy will decrease significantly, making it easier for the billet to shift position during subsequent conveying, forming a vicious cycle of "wear → shift → re-correction → more severe wear". On the other hand, severely worn conveyor rollers require frequent shutdowns for replacement, which not only increases the cost of spare parts procurement, but also disrupts the continuous rolling rhythm and reduces the overall efficiency of the production line. At the same time, if the wear marks on the bottom of steel 5 exceed the processing allowance of the subsequent finishing rolling process, the finished steel 5 may be judged as unqualified due to surface defects, directly affecting the production qualification rate and causing a double waste of raw materials and energy.

[0049] To avoid the aforementioned issues, the existing centering device was redesigned. This redesign prevents significant wear on the surface of the steel 5 during centering adjustments before rough rolling, and also avoids wear on the centering device caused by the steel 5 during position adjustments. This extends the device's lifespan and reduces operating costs and maintenance frequency. The specific structure and operation of this invention are as follows:

[0050] In this invention, the centering device is located at the front end of the roughing mill. After the conventional conveying rollers transport the steel 5 to the centering device, a vision sensor is installed within it to detect whether the steel 5 has fully entered the centering device. Since the vision sensor is existing technology, its specific working principle will not be elaborated here. After confirming that the steel 5 has fully entered the centering device, it is received by the receiving end face formed by the support ball 1. Because the support ball 1 can rotate around its own center, it rolls against the steel 5, exerting no driving force. At this point, the distance between the two correction plates 2 is at its maximum, and the steel 5 supported by the support ball 1 is positioned between the two correction plates 2. Subsequently, the two correction plates 2 move closer together and correct the steel 5. When both correction plates 2 clamp the sidewalls of the steel 5, the steel 5 is centered. It is worth noting that a rotating roller 21 is installed on the correction plate 2, and the correction plate 2 contacts the sidewalls of the steel 5 through the rotating roller 21. Subsequently, the linear actuator 4 drives the drive unit 3 to descend, allowing the drive roller 31 in the drive unit 3 to contact the upper surface of the steel 5. The drive roller 31 then rotates, causing the centered steel 5 to move on the receiving end surface formed by the support ball 1, ultimately conveying the centered steel 5 out of the centering device. During the conveying process, the support ball 1 rolls against the bottom of the steel 5, the rotating roller 21 rolls against the side wall of the steel 5, and the drive roller 31 rolls against the upper part of the steel 5. No significant wear was observed on the steel 5 during the centering process.

[0051] After centering is completed, the two correction plates 2 separate from each other, and the linear driver 4 drives the drive unit 3 to rise, so that the drive roller 31 disengages from the upper part of the steel 5.

[0052] Reference Figure 3 and Figure 5 The drive unit 3 also includes a first rotary driver 32 and a transmission assembly 33;

[0053] The first rotary driver 32 is horizontally disposed on one side of the drive roller 31;

[0054] The transmission assembly 33 is disposed between the first rotary driver 32 and the drive roller 31, and the first rotary driver 32 drives the drive roller 31 through the transmission assembly 33.

[0055] Since the steel 5 needs to be preheated before rough rolling, its temperature is usually high. If the first rotary driver 32 directly drives the drive roller 31, the heat from the steel 5 will be transferred to the drive roller 31 after the drive roller 31 comes into contact with the steel 5, and then to the first rotary driver 32, causing the first rotary driver 32 to be damaged by high temperature. However, with the transmission component 33, the first rotary driver 32 can indirectly drive the drive roller 31. Through the transmission component 33, the heat is gradually dissipated during the transmission process, avoiding damage to the first rotary driver 32 due to heat and extending its service life.

[0056] Reference Figure 4 The transmission assembly 33 includes a chain 331 and a chain 332;

[0057] Multiple toothed discs 331 are provided, and one toothed disc 331 is provided at the end of each drive roller 31. The first rotary driver 32 is used to drive the toothed discs 331 that are not fixedly connected to the drive roller 31 to rotate.

[0058] The chain 332 is mounted on the chain 331 and drives the chain 331.

[0059] When the first rotary driver 32 is started, all the toothed discs 331 rotate synchronously under the driving action of the chain 332, so that the drive roller 31 rotates smoothly and can smoothly drive the steel 5 after centering.

[0060] Reference Figure 4 The transmission assembly 33 also includes a tensioning disc 333, which is disposed between two toothed discs 331, each of which is provided with a drive roller 31. A chain 332 is wound around the upper part of the tensioning disc 333 and drives the tensioning disc 333.

[0061] By setting a tensioning wheel between the two toothed discs 331, which are equipped with drive rollers 31 at both ends, the two toothed discs 331 are adjacent to each other, making it less likely for the chain 332 to slip when it is engaged with the toothed discs 331. This avoids damage to the teeth on the toothed discs 331 due to slippage of the chain 332, and also avoids wear on the chain 332 by the teeth on the toothed discs 331 due to slippage.

[0062] Reference Figure 2 The drive unit 3 also includes a lifting frame 34, a pressing frame 35, and a spring 36;

[0063] The lifting frame 34 is disposed on the upper part of the drive roller 31, and the drive roller 31 is rotatably mounted on the lifting frame 34;

[0064] The pressing frame 35 is positioned above the lifting frame 34, with a gap between the lifting frame 34 and the pressing frame 35. The output end of the linear drive 4 is fixedly connected to the upper part of the pressing frame 35.

[0065] Spring 36 is vertically installed in the gap, and its two ends are fixedly connected to lifting frame 34 and pressing frame 35 respectively.

[0066] To improve the stability of the drive roller 31 when driving the steel 5 and to prevent slippage between the drive roller 31 and the upper end face of the steel 5, a spring 36 is installed between the lifting frame 34 and the pressing frame 35. After the steel 5 is positioned by the two correction plates 2, the linear actuator 4 drives the lifting frame 34 to descend via the pressing frame 35. At this time, the spring 36 is in an uncompressed state. When the drive roller 31 contacts the upper part of the steel 5, the distance between the lifting frame 34 and the pressing frame 35 gradually shortens, and the spring 36 is gradually compressed. The pressure of the drive roller 31 on the upper part of the steel 5 gradually increases, allowing the drive roller 31 to drive the steel 5 to move more stably.

[0067] Reference Figure 2 A lifting rod 341 is vertically fixed on the upper part of the lifting frame 34. The lifting rod 341 vertically passes through the pressing frame 35 and slides with the pressing frame 35.

[0068] The lifting rod 341, extending to the pressing frame 35, cooperates with the pressing frame 35 to ensure that the lifting frame 34 will not deflect after the drive roller 31 contacts the upper part of the steel 5. Simultaneously, a protrusion 342 is provided at the upper end of the lifting rod 341. When the linear actuator 4 drives the pressing frame 35 to rise, the spring 36 gradually returns to its original position, and the lifting rod 341 and the pressing frame 35 slide relative to each other. The protrusion 342 on the upper part of the lifting rod 341 gradually moves closer to the pressing frame 35. Finally, when the protrusion 342 contacts the pressing frame 35, the distance between the pressing frame 35 and the lifting frame 34 remains constant, and at this time, the spring 36 has completed its return to its original position. This ensures that when the lifting frame 34 is raised with the pressing frame 35, the spring 36 will not be pulled by the gravity of the lifting frame 34, extending the service life of the spring 36.

[0069] Reference Figure 5 Multiple friction grooves 311 are evenly provided on the outer peripheral sidewall of the drive roller 31 around the axis of the drive roller 31.

[0070] By opening friction grooves 311 on the outer peripheral sidewall of the drive roller 31, the friction force when the drive roller 31 contacts the steel 5 is increased, thereby ensuring the smoothness of the steel 5 during the conveying process.

[0071] Reference Figure 7 A lead screw 22 is provided on the upper part of the support ball 1 along the arrangement direction of the two correction plates 2. The lead screw 22 passes through the two correction plates 2 in sequence. The lead screw 22 has two threads with opposite rotation directions, and the two threads are respectively threaded with the two correction plates 2.

[0072] When the lead screw 22 rotates, the two correction plates 2 move closer to each other and adjust the centering of the steel 5.

[0073] Reference Figure 7 A second rotary driver 23 for driving the lead screw 22 to rotate is provided at one end of the lead screw 22, and a torque sensor is provided between the second rotary driver 23 and the lead screw 22.

[0074] After the two correction plates 2 have clamped the steel 5, they can no longer move closer together. At this point, the torque value detected by the torque sensor located between the second rotary driver 23 and the lead screw 22 will rise rapidly, indicating that the steel 5 has been aligned. Subsequently, the linear driver 4 drives the drive unit 3 to descend. The drive unit 3 then pushes out the aligned steel 5.

[0075] Reference Figures 1-8 The present invention also relates to a low-wear roughing centering device, including a low-wear roughing centering apparatus.

[0076] Working principle: The first stage is the receiving and initial positioning of steel 5. The centering device is located at the front end of the roughing mill. After the conventional conveyor rollers deliver steel 5 to the centering device, the vision sensor first detects whether steel 5 has completely entered the device. After confirmation, steel 5 will fall on the receiving end surface formed by the support balls 1 arranged in a rectangular array. The support balls 1 can rotate freely around their own center, only providing support and not providing driving force. At this time, steel 5 is between two correction plates 2, and the two correction plates 2 maintain the maximum distance, reserving space for subsequent centering adjustments.

[0077] The next stage is the centering adjustment and drive preparation phase. The centering operation is completed collaboratively by the alignment plate 2 and the lead screw 22 assembly. The lead screw 22 has threads at both ends with opposite rotation directions, which respectively engage with the two alignment plates 2. When the second rotary driver 23 drives the lead screw 22 to rotate, the two alignment plates 2 move closer to each other synchronously. Since a rotating roller 21 is mounted on the side of the alignment plate 2 closest to the steel 5, the clamping force of the alignment plate 2 on the steel 5 is transmitted through the rotating roller 21. The rotating roller 21 forms a rolling fit with the side wall of the steel 5, avoiding direct friction damage to the steel 5. Simultaneously, a torque sensor between the lead screw 22 and the second rotary driver 23 monitors the torque value in real time. When the two alignment plates 2 completely clamp the steel 5 and cannot move closer, the torque value rises rapidly, indicating that centering is complete. Subsequently, the vertically positioned linear driver 4 drives the upper drive unit 3 to descend until the drive roller 31 in the drive unit 3 contacts the upper surface of the steel 5, preparing for the transport of the steel 5.

[0078] Finally, there is the stage of conveying steel 5 and resetting the device. The power of the drive unit 3 is provided by the first rotary driver 32. The first rotary driver 32 drives the drive roller 31 to rotate through the transmission assembly 33 composed of a toothed disc 331 and a chain 332. The toothed discs 331 are respectively set at the ends of each drive roller 31 and the output end of the first rotary driver 32. The chain 332 is sleeved on the toothed discs 331 to achieve synchronous transmission. The tensioning disc 333 set in the transmission assembly 33 can prevent the chain 332 from slipping and ensure stable power transmission. When the drive roller 31 rotates, it will drive the aligned steel 5 to move on the receiving end surface formed by the support ball 1. At this time, the support ball 1 and the bottom of the steel 5, the rotating roller 21 and the side wall of the steel 5, and the drive roller 31 and the upper part of the steel 5 all maintain rolling contact, with no obvious sliding friction throughout the process, effectively avoiding wear. After the steel 5 is completely sent out of the centering device, the two correction plates 2 separate from each other under the drive of the lead screw 22. The linear actuator 4 drives the drive unit 3 to rise, so that the drive roller 31 is separated from the upper surface of the steel 5. The device returns to its initial state and waits for the next steel 5 to enter.

[0079] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A low wear roughing centering device, characterized in that, It comprises a support ball (1), a correction plate (2), a driving unit (3) and a linear driver (4); The support ball (1) is arranged in a rectangular array and forms a receiving end face for receiving the steel material (5), and the support ball (1) is in rolling cooperation with the bottom of the steel material (5); The correction plate (2) is provided with two, and the two correction plates (2) are arranged on the two sides of the receiving end face, and the two correction plates (2) can be close to or away from each other, and the side of the two correction plates (2) close to each other is rotatably provided with a rotating roller (21), and the rotating roller (21) is in rolling cooperation with the side wall of the steel material (5); The driving unit (3) is arranged above the receiving end face, and the driving unit (3) comprises a driving roller (31), the driving roller (31) is used for contacting and driving the upper part of the steel material (5) to move, and the axis of the driving roller (31) is parallel to the arrangement direction of the two correction plates (2); The linear driver (4) is vertically arranged on the upper part of the driving unit (3), and the linear driver (4) drives the driving unit (3) to ascend and descend.

2. A low wear roughing centering device according to claim 1, characterized in that The driving unit (3) further comprises a first rotary driver (32) and a transmission assembly (33); The first rotary driver (32) is horizontally arranged on one side of the driving roller (31); The transmission assembly (33) is arranged between the first rotary driver (32) and the driving roller (31), and the first rotary driver (32) drives the driving roller (31) through the transmission assembly (33).

3. A low wear roughing centering device according to claim 2, characterized in that The transmission assembly (33) comprises a toothed disc (331) and a chain (332); The toothed disc (331) is provided with a plurality of toothed discs (331), and one toothed disc (331) is arranged at the end of each driving roller (31), and the first rotary driver (32) is used for driving the toothed disc (331) not fixedly connected with the driving roller (31) to rotate; The chain (332) is sleeved on the toothed disc (331) and is in transmission cooperation with the toothed disc (331).

4. A low wear roughing centering device according to claim 3, characterized in that The transmission assembly (33) further comprises a tensioning disc (333), the tensioning disc (333) is arranged between the toothed discs (331) provided with the driving rollers (31) at both ends, and the chain (332) is wound from the upper part of the tensioning disc (333) and is in transmission cooperation with the tensioning disc (333).

5. A low wear roughing centering device according to claim 1, characterized in that The driving unit (3) further comprises a lifting frame (34), a pressing frame (35) and a spring (36); The lifting frame (34) is arranged on the upper part of the driving roller (31), and the driving roller (31) is rotatably arranged on the lifting frame (34); The pressing frame (35) is arranged above the lifting frame (34), and a gap is formed between the lifting frame (34) and the pressing frame (35), and the output end of the linear driver (4) is fixedly connected with the upper part of the pressing frame (35); The spring (36) is vertically arranged in the gap, and the two ends of the spring (36) are fixedly connected with the lifting frame (34) and the pressing frame (35) respectively.

6. A low wear roughing centering device according to claim 5, characterized in that A lifting rod (341) is vertically and fixedly arranged on the upper part of the lifting frame (34), and the lifting rod (341) vertically penetrates the pressing frame (35) and is in sliding cooperation with the pressing frame (35).

7. A low wear roughing centering device according to claim 1, characterized in that A plurality of friction grooves (311) are uniformly arranged on the outer peripheral side wall of the driving roller (31) around the axis of the driving roller (31).

8. A low wear roughing centering device according to claim 1, characterized in that A screw rod (22) is arranged along the arrangement direction of the two correction plates (2) at the upper part of the supporting ball (1), the screw rod (22) passes through the two correction plates (2) in sequence, the screw rod (22) has two sections of threads with opposite rotation directions, and the two sections of threads are threadedly matched with the two correction plates (2) respectively.

9. A low wear roughing centering device according to claim 8, characterized in that A second rotation driver (23) for driving the screw rod (22) to rotate is arranged at one end of the screw rod (22), and a torsion sensor is arranged between the second rotation driver (23) and the screw rod (22).

10. A low wear roughing centering apparatus characterized by, A low-wear rough rolling centering device comprising a low-wear rough rolling centering device as claimed in any one of claims 1-9.

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