A steel billet centering, turning and grinding production line

Abstract

The present invention provides a billet centering, turning and grinding production line, which includes a billet conveying device, a turning area and a centering grinding area provided in the billet conveying device, the turning area being provided with a turning mechanism for turning the billet during the billet conveying process; centering grinding areas being provided on both sides of the turning area, the centering grinding areas being provided with a plurality of pairs of front push rods, a plurality of pairs of center push rods and a pair of rear push rods in sequence according to the conveying direction; the plurality of pairs of front push rods, the plurality of pairs of center push rods and a pair of rear push rods being symmetrically mounted on both sides of the billet conveying device for centering the billet for conveying; the tops of the pairs of front push rods and the tops of the center push rods being provided with a grinding rolling mechanism for removing oxide scale from the billet surface. The present invention adopts a progressive centering method, which can alleviate the collision of the billet, reduce the failure rate of the production line and extend the service life; remove the oxide scale on the side of the billet while correcting the deviation of the billet; and the production line device has a simple structure and is easy to maintain.

Description

Technical Field

[0001] The present invention relates to the field of steel billet transportation or the field of removing oxides from steel billets, and in particular to a steel billet centering, turning and grinding production line. Background Art

[0002] After the hot-rolled steel billets come out of the heating furnace, they are transported by rollers. During the transportation process, the steel billets may deviate from the center due to uneven friction or other reasons. Although the side guides on both sides of the rollers have a guiding and centering function, they are not very effective in preventing serious deviation. When the deviation is serious, the side guides will be damaged under the huge impact, and even cause the steel billets to hit the equipment, resulting in a major accident.

[0003] The centering device plays an important role in hot rolling billet equipment. It is a key device for controlling the left and right positions of the billet to prevent deviation. The existing technology proposes to control the entire liner by a servo hydraulic cylinder, and control the position of the billet before and after entering the pinch rollers by pressing against the billet. The billet speed can reach 8-15m / s during operation, which makes the liner in contact with the billet prone to very serious wear. After wear, the entire centering device can no longer function normally. Depending on the output, the liner needs to be replaced every 2-3 shifts. The workload of replacing the liner accounts for a large proportion in the maintenance of the hot rolling billet production line. The existing liner replacement process requires the use of multiple bolts to connect to the hydraulic cylinder drive frame. The connection process is very complicated and the work efficiency is low. The production line needs to be stopped during the replacement of the liner, which seriously limits the work efficiency of the hot rolling billet.

[0004] The prior art also proposes a centering device structure in which telescopic rods are arranged on both sides of the billet, and the purpose of centering the billet is achieved by pushing the rods. However, this method requires that the push rods will only work when the billet reaches a predetermined position. Therefore, the existence of the centering device will lengthen the length of the production line, which is not in line with the current trend of short-process steel rolling. Secondly, this method must be equipped with a corresponding servo mechanism to synchronize with the billet. At the same time, the strong friction during the centering process will damage the end of the push rod. There is no buffering during the entire centering process, which is easy to cause damage to the equipment, resulting in a high equipment failure rate and a short service life. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a billet centering production line, which comprises a plurality of push rods, a push wheel at one end of the push rod, and a visual sensor on the side of the conveyor belt. During the transportation of the billet, when it is detected that the billet has deviated, the visual sensor sends a correction signal, and the push rod straight-moving mechanism corrects the deviated billet so that the billet can be transported in a straight line. The push wheel at the end of the push rod is used to remove oxide scales on both sides of the billet during the correction process. At the same time, the centering method provided by the present invention is a progressive centering method. Through the correction effect of several groups of front push rods and several groups of middle push rods, the billet is basically centered when it is transported to the rear push rod, and after the final limitation of the rear push rod, the billet can be completely centered. At the same time, a flipping mechanism is provided, and the gear teeth of the two adjacent front push rod push wheels and the gear teeth of the middle push rod push wheel are staggered with each other, so that the oxide scale on the surface of the billet can be completely removed.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A billet centering, turning and grinding production line includes a billet conveying device, a turning area and a centering and grinding area provided in the billet conveying device, the turning area being provided with a turning mechanism for turning the billet during the billet conveying process; centering and grinding areas are provided on both sides of the turning area, and the centering and grinding areas are provided with a plurality of pairs of front push rods, a plurality of centering push rods and a pair of rear push rods in sequence according to the conveying direction;

[0008] Several pairs of front push rods, several pairs of middle push rods and a pair of rear push rods are symmetrically installed on both sides of the billet conveying device for centering the billet for conveying; one end of the several pairs of front push rods and one end of the middle push rod are respectively provided with a grinding and rolling mechanism for removing the oxide scale on the surface of the billet.

[0009] Furthermore, the front push rod includes a grinding rolling mechanism and a front push rod straight mechanism; the freely rotatable grinding rolling mechanism is installed on the telescopic rod of the front push rod straight mechanism, and the front push rod straight mechanism is used to make the grinding rolling mechanism telescopic.

[0010] Furthermore, the front push rods are installed obliquely with respect to the moving direction of the conveyor belt, and the included angle α between the front push rods and the center line of the conveyor belt is 45°<α<75°; the included angle α between each pair of front push rods and the center line of the conveyor belt increases along the moving direction of the conveyor belt.

[0011] Furthermore, the middle push rod includes a grinding rolling mechanism and a middle push rod straight mechanism, and the freely rotatable grinding rolling mechanism is installed on the telescopic rod of the middle push rod straight mechanism, and the middle push rod straight mechanism is used to make the grinding rolling mechanism telescopic.

[0012] Furthermore, the middle push rod is installed obliquely with respect to the moving direction of the conveyor belt, and the included angle β between the middle push rod and the center line of the conveyor belt is α<β<90°; along the moving direction of the conveyor belt, the included angle β between each pair of middle push rods and the center line of the conveyor belt increases.

[0013] Furthermore, the grinding and rolling mechanism is a top wheel, which is installed on the telescopic rod of the middle push rod straight mechanism or the front push rod straight mechanism. The radially distributed arc-shaped protrusions on the outer surface of the top wheel are used to remove oxide scale on the surface of the steel billet.

[0014] Furthermore, the outer surface of the top wheel is provided with 2-5 radially distributed arc-shaped protrusions.

[0015] Furthermore, the arc-shaped protrusions on adjacent top wheels are arranged in a staggered manner.

[0016] Furthermore, the rear push rod includes a rear push rod top wheel and a rear push rod straight-moving mechanism. The telescopic rod of the rear push rod straight-moving mechanism is equipped with a freely rotatable rear push rod top wheel, and the rear push rod straight-moving mechanism is used to extend and retract the rear push rod top wheel. The angle between the rear push rod and the center line of the conveyor belt is 90°.

[0017] Furthermore, the centering and grinding area further includes a visual sensor, which is used to identify the angle between the axis of the steel billet and the center line of the conveyor belt.

[0018] The beneficial effects of the present invention are:

[0019] 1. The steel billet centering, turning and grinding production line described in the present invention adopts progressive multi-point deviation correction. When the steel billet deviates, the front push rod and the middle push rod correct the deviated steel billet, so that the steel billet gradually approaches the center line of the conveyor belt. The final centering is completed when it reaches the rear push rod, realizing the centering of the deviated billet with a large deviation; multi-point deviation correction can effectively alleviate the impact force of the steel billet, reduce the equipment failure rate, and increase the service life of the equipment.

[0020] 2. The steel billet centering and turning grinding production line described in the present invention is provided with two centering and grinding areas and one turning area. Each centering and grinding area can complete the work of correcting the steel billet and removing the oxide scale on both sides, so that the oxide scale around the steel billet after passing through the second centering and grinding area can be completely removed and the steel billet can be transported to the next working area along the center line direction of the conveyor belt.

[0021] 3. The steel billet centering, turning and grinding production line of the present invention does not require synchronous movement of the steel billet, and the device structure is simple and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of the steel billet centering, turning and grinding production line according to the present invention;

[0024] Figure 2 This is a schematic diagram of the front push rod structure of the present invention;

[0025] Figure 3 This is an enlarged cross-sectional view of the front push rod and push wheel of the present invention;

[0026] Figure 4 This is a partial enlarged view of the centering grinding area described in the present invention.

[0027] In the picture:

[0028] 1. Billet; 2. Front push rod; 3. Middle push rod; 4. Rear push rod; 5. Visual sensor; 6. Flipping mechanism; 2-1. Front push rod top wheel; 2-2. Front push rod straight-moving mechanism; 3-1. Middle push rod top wheel; 3-2. Middle push rod straight-moving mechanism; 4-1. Rear push rod top wheel; 4-2. Rear push rod straight-moving mechanism. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "axial", "radial", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] like Figure 1 As shown, the billet centering, turning and grinding production line of the present invention includes three working areas: centering and grinding area A, centering and grinding area B, and turning area. Centering and grinding areas A and B are located on either side of the turning area. Centering and grinding area A is used to center the billet 1 on the conveyor belt and grind both sides simultaneously. The turning area is equipped with a turning mechanism 6 for turning the centered billet 1 90°. The centered billet 1 is turned by the automated turning mechanism 6. Centering and grinding area B is used to center the billet 1 on the conveyor belt after it has been turned 90° and grind the other two sides simultaneously.

[0033] like Figure 1 As shown, the structures of the centering grinding area A and the centering grinding area B are the same, so the centering grinding area A is used as an example for the following description. Figure 4As shown, the centering and grinding area A includes a visual sensor 5, several pairs of front push rods 2, several pairs of centering push rods 3 and a pair of rear push rods 4. The middle of the centering and grinding area A is the steel billet 1 conveyor belt, and several pairs of front push rods 2, several pairs of centering push rods 3 and a pair of rear push rods 4 are arranged in sequence along the moving direction of the conveyor belt; the visual sensor 5 is located in front of the centering and grinding area A, and uses image technology to identify the angle between the axis of the steel billet 1 and the center line of the conveyor belt. A reference line of the center line can be set on the steel billet 1 conveyor belt, which is convenient for the visual sensor 5 and the subsequent image processing to determine the center line of the conveyor belt.

[0034] Several pairs of front push rods 2 are equidistantly distributed in front of the centering grinding area A along the moving direction of the steel billet 1. Each pair of front push rods 2 consists of two front push rods 2 distributed on both sides of the conveyor belt of the steel billet 1. The front push rods 2 include front push rod top wheels 2-1 and front push rod straight-moving mechanisms 2-2. The front push rod top wheels 2-1 that can rotate freely are installed on the telescopic rod of the front push rod straight-moving mechanism 2-2. A bearing is installed in the front push rod top wheel 2-1, and the inner ring of the bearing is connected to the telescopic rod. When the steel billet 1 contacts the front push rod 2 on one side through the conveyor belt, the surface of the front push rod top wheel 2-1 contacts the side surface of the steel billet 1 at a high pair, and the friction force is used to drive the front push rod top wheel 2-1 to rotate. The front push rod straight-moving mechanism 2-2 adjusts the distance that the front push rod top wheel 2-1 extends. Figure 2 As shown, the surface of the front push rod top wheel 2-1 is provided with two radially distributed arc-shaped protrusions, the tops of which are in contact with the side surface of the billet 1 to remove oxide scale from the surface of the billet 1. In the embodiment, the surface of the front push rod top wheel 2-1 is provided with 2-5 radially distributed arc-shaped protrusions, each of which is an arc-shaped wheel disc, and the wheel disc center is gradually reduced to the end of the wheel disc in an arc shape.

[0035] The arc-shaped protrusions on the front push rod top wheels 2-1 of the adjacent front push rods 2 are staggered, that is, the position where the arc-shaped protrusion on one front push rod top wheel 2-1 contacts the side of the steel billet 1 is different from the position where the arc-shaped protrusion on the front push rod top wheel 2-1 on its side contacts the side of the steel billet 1. This can ensure that the oxide scale on the entire side of the steel billet 1 can be removed. In addition, it can also avoid repeated excessive removal of oxide scale on the side of the steel billet 1 at the same position.

[0036] The front push rod 2 is installed at an angle relative to the direction of movement of the conveyor belt, wherein the angle α between the front push rod 2 and the centerline of the conveyor belt is 45°<α<75°. The angle α between each pair of front push rods 2 and the centerline of the conveyor belt increases along the direction of movement of the conveyor belt. The front push rod straightening mechanism 2-2 is also equipped with a pressure sensor for detecting the pressure applied to the front push rod top wheel 2-1. When the pressure sensor detection value exceeds a set value, the front push rod straightening mechanism 2-2 is controlled to retract the telescopic rod. This is to protect the front push rod straightening mechanism 2-2 and prevent the telescopic rod from bending. It is also to prevent excessive friction between the surface of the front push rod top wheel 2-1 and the side of the billet 1, which would scratch the surface of the billet 1, i.e., leave deep marks on the surface of the billet 1. A rotating device can also be installed at the bottom of the front push rod 2 to change the angle α between the front push rod 2 and the centerline of the conveyor belt.

[0037] Several pairs of centering rods 3 are equidistantly distributed in the center of centering and grinding area A along the direction of motion of the billet 1. Each pair of centering rods 3 consists of two centering rods 3, located on either side of the billet 1 conveyor belt. Each centering rod 3 includes a centering rod top wheel 3-1 and a centering rod straightening mechanism 3-2. A freely rotatable front top wheel 3-1 is mounted on the telescopic rod of the centering rod straightening mechanism 3-2. A bearing is installed within the centering rod top wheel 3-1, the inner ring of which is connected to the telescopic rod. When the billet 1 contacts one of the centering rods 3 on the conveyor belt, the surface of the centering rod top wheel 3-1 makes high-pitch contact with the side surface of the billet 1, driving the centering rod top wheel 3-1 to rotate by friction. The centering rod straightening mechanism 3-2 adjusts the extension distance of the centering rod top wheel 3-1. Two radially distributed arc-shaped protrusions are provided on the surface of the centering rod top wheel 3-1. The tops of the arc-shaped protrusions contact the side surface of the billet 1 to remove oxide scale from the surface of the billet 1. In the embodiment, the surface of the middle push rod top wheel 3-1 is provided with 2-5 radially distributed arc-shaped protrusions.

[0038] The arc-shaped protrusions on the middle push rod top wheels 3-1 of adjacent middle push rods 3 are staggered, that is, the position where the arc-shaped protrusion on one middle push rod top wheel 3-1 contacts the side of the steel billet 1 is different from the position where the arc-shaped protrusion on the middle push rod top wheel 3-1 on its side contacts the side of the steel billet 1. This can ensure that the oxide scale on the entire side of the steel billet 1 can be removed. In addition, it can also avoid repeated excessive removal of oxide scale on the side of the steel billet 1 at the same position.

[0039] The middle push rod 3 is installed obliquely with respect to the moving direction of the conveyor belt, wherein the included angle between the middle push rod 3 and the center line of the conveyor belt is β, α<β<90°, and the included angle β between each pair of middle push rods 3 and the center line of the conveyor belt increases along the moving direction of the conveyor belt. The middle push rod straight-moving mechanism 3-2 is also provided with a pressure sensor for detecting the pressure exerted on the front push rod top wheel 3-1. When the pressure sensor detection value exceeds the set value, the middle push rod straight-moving mechanism 3-2 is controlled to retract the telescopic rod. This is to protect the middle push rod straight-moving mechanism 3-2 and prevent the telescopic rod from bending. On the other hand, it is to prevent excessive friction between the surface of the middle push rod top wheel 3-1 and the side of the billet 1, which would scratch the surface of the billet 1, i.e., leave deep marks on the surface of the billet 1. A rotating device can also be installed at the bottom of the middle push rod 3 to change the included angle between the middle push rod 3 and the center line of the conveyor belt to β.

[0040] A pair of rear push rods 4 are vertically installed at the rear of the centering and grinding area A. The angle between the rear push rods 4 and the center line of the conveyor belt is 90°. The rear push rods 4 include a rear push rod top wheel 4-1 and a rear push rod straight-moving mechanism 4-2. The rear push rod top wheel 4-1 is a smooth cylinder and is used to make the final limit on the steel billet 1. After the centering of several pairs of front push rods 2 and several centering push rods 3, the steel billet 1 on the conveyor belt has been basically centered. After the final limit is made by the rear push rod top wheel 4-1, the steel billet 1 is completely centered, so that the steel billet 1 is transported to the flipping area on the conveyor belt along the center line of the conveyor belt.

[0041] The flipping mechanism 6 can be a manual flipping mechanism that uses a crane and a sling to achieve flipping; the flipping mechanism 6 can also be an automated clamping and flipping device that is equipped with at least two mechanical arms.

[0042] Working process:

[0043] When image technology is used to identify the angle between the axis of the billet 1 and the centerline of the conveyor belt, the front push rod straightening mechanism 2-2 drives the telescopic rod to extend, causing the front push rod top wheel 2-1 on one side to contact the billet 1 and apply thrust to the billet 1, correcting the deviation of the billet 1 and gradually bringing the center of the deviated billet 1 closer to the centerline of the conveyor belt. Generally, only one side of the front push rod 2 of the first 1-2 pairs of front push rods 2 will contact the billet 1. The side that contacts the billet 1 removes the oxide scale of the billet 1 through the arc-shaped protrusions staggered on the front push rod top wheel 2-1. The front push rods 2 on both sides of the following pairs of front push rods 2 will contact the side of the billet 1. When the angle between the axis of the billet 1 and the centerline of the conveyor belt is too small, the front push rod top wheels 2-1 on both sides cannot contact the side of the billet 1, and the α angle needs to be changed by the rotation device.

[0044] After the deviation is corrected by several pairs of front push rods 2, the steel billet 1 gradually approaches the center line of the conveyor belt, and the angle between the axis of the steel billet 1 and the center line of the conveyor belt becomes smaller and smaller. When the steel billet 1 moves to the middle of the centering and grinding area A with the conveyor belt, the steel billet 1 has basically been centered, and the middle push rod straight-moving mechanism 3-2 drives the telescopic rod to extend, so that the middle push rod top wheel 3-1 on one side contacts the steel billet 1 and applies thrust to the steel billet 1, correcting the deviated steel billet 1, so that the center line of the deviated billet 1 gradually approaches the center line of the conveyor belt; there are several pairs of middle push rods 3, and after completing the deviation correction process, the middle push rods 3 on both sides of each pair of middle push rods 3 contact the steel billet 1, and the oxide scale of the steel billet 1 is removed by the arc-shaped protrusions staggered on the middle push rod top wheels 3-1, and the arc-shaped protrusions on the middle push rod top wheels 3-1 of adjacent middle push rods 3 are staggered.

[0045] After being centered and ground by several centering push rods 3, the steel billet 1 is conveyed to the rear of the centering and grinding area A. At this time, the steel billet 1 has been centered, and the oxide scales on both sides have been completely removed. There is a pair of rear push rods 4 at the rear of the centering and grinding area A. The rear push rods 4 are vertically installed at the rear of the centering and grinding area A. The steel billet 1 is finally defined by the rear push rods 4 so that the axis of the steel billet 1 completely coincides with the center line of the conveyor belt and is conveyed to the reversal area. The reversing area is provided with a reversing mechanism 6 for reversing the centered steel billet 1 90°.

[0046] The flipped billet 1 enters the centering and grinding area B, which repeats the work process of the centering and grinding area A, and transports the flipped billet 1 in a centering manner and removes the oxide scale on both sides, so that the billet 1 can be transported to the next work area along the center line of the conveyor belt.

[0047] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0048] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A billet centering, turning and grinding production line, the production line includes a billet conveying device, characterized in that: A turning area and a centering grinding area are provided in a billet conveying device, wherein the turning area is provided with a turning mechanism (6) for turning the billet (1) during the billet conveying process; centering grinding areas are provided on both sides of the turning area, and the centering grinding areas are provided with a plurality of pairs of front push rods (2), a plurality of centering push rods (3) and a pair of rear push rods (4) in sequence according to the conveying direction; A plurality of pairs of front push rods (2), a plurality of pairs of center push rods (3) and a pair of rear push rods (4) are symmetrically mounted on both sides of the billet conveying device, and are used to center the billet (1) for conveying; one end of the plurality of pairs of front push rods (2) and one end of the center push rod (3) are respectively provided with a grinding rolling mechanism, and are used to remove oxide scale from the surface of the billet (1); The front push rods (2) are installed obliquely with respect to the moving direction of the conveyor belt, and the angle between the front push rods (2) and the center line of the conveyor belt is α, 45°<α<75°; along the moving direction of the conveyor belt, the angle α between each pair of front push rods (2) and the center line of the conveyor belt increases; The middle push rod (3) is installed obliquely with respect to the moving direction of the conveyor belt, and the included angle β between the middle push rod (3) and the center line of the conveyor belt is α<β<90°; along the moving direction of the conveyor belt, the included angle β between each pair of middle push rods (3) and the center line of the conveyor belt increases; The rear push rod (4) comprises a rear push rod top wheel (4-1) and a rear push rod straight-moving mechanism (4-2); a freely rotatable rear push rod top wheel (4-1) is mounted on a telescopic rod of the rear push rod straight-moving mechanism (4-2); the rear push rod straight-moving mechanism (4-2) is used to extend and retract the rear push rod top wheel (4-1); and the angle between the rear push rod (4) and the center line of the conveyor belt is 90°.

2. The steel billet centering, turning and grinding production line according to claim 1 is characterized in that: The front push rod (2) comprises a grinding rolling mechanism and a front push rod straight mechanism (2-2); a freely rotatable grinding rolling mechanism is installed on the telescopic rod of the front push rod straight mechanism (2-2), and the front push rod straight mechanism (2-2) is used to extend and retract the grinding rolling mechanism.

3. The steel billet centering, turning and grinding production line according to claim 1 is characterized in that: The middle push rod (3) comprises a grinding rolling mechanism and a middle push rod straight mechanism (3-2); a freely rotatable grinding rolling mechanism is mounted on the telescopic rod of the middle push rod straight mechanism (3-2); the middle push rod straight mechanism (3-2) is used to extend and retract the grinding rolling mechanism.

4. The steel billet centering, turning and grinding production line according to any one of claims 1 to 3, characterized in that: The grinding rolling mechanism is a top wheel, which is mounted on the telescopic rod of the middle push rod straight mechanism (3-2) or the front push rod straight mechanism (2-2). The top wheel has radially distributed arc-shaped protrusions on its outer surface, which are used to remove oxide scale from the surface of the steel billet (1).

5. The steel billet centering, turning and grinding production line according to claim 4, characterized in that: The outer surface of the top wheel is provided with 2 to 5 radially distributed arc-shaped protrusions.

6. The steel billet centering, turning and grinding production line according to claim 4, characterized in that: The arc-shaped protrusions on adjacent top wheels are arranged in a staggered manner.

7. The steel billet centering, turning and grinding production line according to claim 1, characterized in that: The centering grinding area further comprises a visual sensor (5), and the visual sensor (5) is used to identify the angle between the axis of the steel billet (1) and the center line of the conveyor belt.

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