Device and method for preventing sticking of steel to a rail roll surface

Abstract

This invention relates to a device and method for preventing steel from sticking to the surface of rail rolls, belonging to the field of rail rolling technology in the metallurgical industry. The technical solution is as follows: a guide plate (1) and a scraper (2) are fixed to the mill beam (5) by bolts (3) and washers (4). One side of the scraper (2) contacts the roll pass. One side of the guide plate (1) has an inclined surface (6), the slope of which in the vertical direction is consistent with the slope of the roll leg pass. The guide plate (1) has a rectangular groove (7) that matches the mill beam (5) and a threaded hole (8) that matches the bolt (3). The scraper (2) has a rectangular hole (9) that matches the bolt (3). The beneficial effects of this invention are: it can assist in the straightening of the workpiece during the bite-in stage by the guide plate, reducing the direct impact of the workpiece on the roll; and in the next rotation cycle after steel sticking occurs on the roll, the scraper removes the steel stuck to the roll surface.

Description

Technical Field

[0001] This invention relates to a device and method for preventing steel from sticking to the surface of rail rolls, belonging to the field of rail rolling technology in the metallurgical industry. Background Technology

[0002] In rail production, the rough rolling stage typically uses a two-roll reversible rolling mill, where the billet is rolled into a basic rail shape through several rail-shaped passes. For example... Figure 1 As shown, the rails are rolled horizontally. Due to the shape characteristics of the rail blanks, when they are laid flat on the roller table, the bottom surface of the rail is not perpendicular to the roller table surface, but at a certain angle A. When the blank bites into the die, the upper leg tip of the rail bottom first contacts the upper roller web. Under the combined force of the upper roller surface and the side guide plate, the blank is gradually twisted to 90° and finally bites in. This results in a violent impact contact between the upper roller surface and the upper leg tip of the blank during the blank twisting stage, which can easily cause steel to stick to the upper roller surface and eventually be pressed into the surface of the blank, forming a scrap defect and causing serious economic losses. Summary of the Invention

[0003] The purpose of this invention is to provide a device and method for preventing steel from sticking to the surface of rail rolls. This device and method can assist in the straightening of the workpiece during the workpiece biting stage by using a guide plate to reduce the direct impact of the workpiece on the rolls. In the next rotation cycle after steel sticking occurs, the steel sticking to the rolls is removed by a scraper, thus solving the problems existing in the prior art.

[0004] The technical solution of this invention is:

[0005] A device for preventing steel from sticking to the surface of rail rolls includes a guide plate, a scraper, bolts, and washers. The guide plate and scraper are fixed to the mill crossbeam by bolts and washers. One side of the scraper is in contact with the roll pass. One side of the guide plate is provided with an inclined surface, the slope of which in the vertical direction is consistent with the slope of the roll leg pass.

[0006] The guide plate is provided with a rectangular slot that matches the mill crossbeam and a threaded hole that matches the bolt, and the scraper is provided with a rectangular hole that matches the bolt.

[0007] The bolts pass through the rectangular holes and washers on the scraper in sequence and are screwed into the threaded holes on the guide plate, thus fastening the guide plate and scraper to the mill crossbeam.

[0008] The scraper is a long strip, with one end being the working end and the other end being the fixed end. The shape of the working end of the scraper matches the roll hole shape, and the rectangular hole is set at the fixed end of the scraper.

[0009] The horizontal extension direction of the inclined plane is at a certain angle to the rolling direction.

[0010] A method for preventing steel from sticking to the surface of rail rolls employs the aforementioned device for preventing steel from sticking to the surface of rail rolls. When the workpiece bites in, the tip of the workpiece first contacts the inclined surface of the guide plate, and with the assistance of the inclined surface of the guide plate, the workpiece is gradually twisted and straightened to achieve smooth bite of the workpiece. At the same time, in the next rotation cycle after steel sticking occurs on the roll, the steel sticking to the surface of the roll is removed by a scraper.

[0011] The beneficial effects of this invention are: when the workpiece bites in, as the workpiece moves toward the roll, it is guided by the inclined surface of the guide plate, gradually straightening the workpiece and achieving a more stable bite, thereby reducing the steel sticking caused by the direct impact between the leg tip and the roll; at the same time, with the help of the perforated scraper, the steel sticking on the roll surface can be cleaned in time, thereby reducing the defects and scrap caused by steel sticking on the rail surface. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the bite-and-twist process of a rolled piece under the background technology.

[0013] Figure 2 This is a schematic diagram of the structure of the present invention;

[0014] Figure 3 This is the front view of the present invention;

[0015] Figure 4 This is the main view of the guide plate;

[0016] Figure 5 Left view of the guide plate;

[0017] Figure 6 This is a top view of the guide plate;

[0018] Figure 7 This is a schematic diagram of the scraper.

[0019] Figure 8 This is a schematic diagram of a gasket;

[0020] Figure 9 This is a schematic diagram of the workpiece biting and twisting process during the present invention;

[0021] In the diagram: 1-Guide plate, 2-Scraper, 3-Bolt, 4-Shim, 5-Mill crossbeam, 6-Inclined surface, 7-Rectangular groove, 8-Threaded hole, 9-Rectangular hole, 10-Scraper working end, 11-Round hole. Detailed Implementation

[0022] The invention will be further described below with reference to the accompanying drawings and examples.

[0023] See attached document Figure 2-9A device for preventing steel from sticking to the surface of rail rolls includes a guide plate 1, a scraper 2, bolts 3 and washers 4. The guide plate 1 and the scraper 2 are fixed to the mill crossbeam 5 by bolts 3 and washers 4. One side of the scraper 2 is in contact with the roll pass. One side of the guide plate 1 is provided with an inclined surface 6. The slope of the inclined surface 6 in the vertical direction is consistent with the slope of the roll leg pass.

[0024] In this embodiment, refer to the appendix Figure 2-9 The device consists of a guide plate 1, a scraper 2, a gasket 3, and fixing bolts 4. The guide plate 1 has a rectangular slot 7 and two sets of threaded holes 8 on its upper part. The width of the rectangular slot 7 matches the width of the mill crossbeam 5, allowing the mill crossbeam 5 to be embedded within the rectangular slot 7 and fixed by the bolts 8. One side of the guide plate 1 has an inclined surface 6. The vertical slope of the inclined surface 6 matches the slope of the workpiece rail leg groove. The horizontal extension direction of the inclined surface 6 is at a certain angle to the rolling direction, forming a semi-flared shape.

[0025] Figure 7 The scraper 2 is a long strip with a working end 10 at one end and a fixed end at the other. The shape of the working end 10 is complementary to the shape of the part to be scraped by the roller hole. The fixed end has two sets of rectangular holes 9, which can adjust the front and rear position of the scraper 2.

[0026] Figure 8 As shown, the gasket 4 is rectangular, with a round hole 11 at each of its four corners. The positions of the round holes 11 correspond to the positions of the bolts 3.

[0027] Figure 2 , 3 As shown in Figure 7, the bolt 3 passes through the scraper 2 and the washer 3 in sequence and is screwed into the threaded hole 8 on the guide plate 1, thus fastening the entire device to the mill crossbeam 5.

[0028] When the roll diameter changes, adjusting the thickness of the shim 3 can ensure that the scraper 2 always points towards the center of the roll. Adjusting the front and rear position of the scraper 2 can ensure that the working end 10 of the scraper always fits against the roll surface.

[0029] Figure 9 The display shows that during the biting of the workpiece, as the workpiece moves towards the roll, the tip of the workpiece first contacts the front end of the inclined surface 6 of the guide plate 1, and under the combined action of the inclined surface 6 of the guide plate 1 and the side guide plate, it is gradually twisted to 90°, achieving a relatively stable biting of the workpiece. At the same time, in the next rotation cycle after steel sticking to the roll, the scraper 2 removes the sticking steel from the surface of the roll.

Claims

1. A device for preventing steel from sticking to the surface of rail rolls, characterized in that: Includes a guide plate (1), a scraper (2), bolts (3) and a gasket (4). The guide plate (1) and the scraper (2) are fixed on the mill crossbeam (5) by bolts (3) and gasket (4). One side of the scraper (2) is in contact with the roll pass. One side of the guide plate (1) is provided with an inclined surface (6). The slope of the inclined surface (6) in the vertical direction is consistent with the slope of the roll leg pass. The horizontal extension direction of the inclined plane (6) is at a certain angle to the rolling direction.

2. The device for preventing steel from sticking to the surface of rail rolls according to claim 1, characterized in that: The guide plate (1) is provided with a rectangular slot (7) that matches the mill beam (5) and a threaded hole (8) that matches the bolt (3), and the scraper (2) is provided with a rectangular hole (9) that matches the bolt (3).

3. The device for preventing steel from sticking to the surface of rail rolls according to claim 2, characterized in that: The bolt (3) passes through the rectangular hole (9) and the washer (4) on the scraper (2) in sequence and is screwed into the threaded hole (8) on the guide plate (1) to fasten the guide plate (1) and the scraper (2) to the mill beam (5).

4. The device for preventing steel from sticking to the surface of rail rolls according to claim 3, characterized in that: The scraper (2) is a long strip. One end of the scraper (2) is the working end (10), and the other end of the scraper (2) is the fixed end. The shape of the working end (10) of the scraper (2) matches the roll hole shape, and the rectangular hole (9) is set at the fixed end of the scraper (2).

5. A method for preventing steel from sticking to the surface of rail rolls, characterized in that: The device for preventing steel from sticking to the surface of rail rolls as defined in any one of claims 1-4 is used. When the workpiece bites in, the tip of the workpiece first contacts the inclined surface (6) of the guide plate (1), and with the assistance of the inclined surface (6) of the guide plate (1), the workpiece is gradually twisted and straightened to achieve smooth biting of the workpiece. At the same time, in the next rotation cycle after the steel sticking to the roll, the steel sticking to the surface of the roll is removed by the scraper (2).

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