CN201244573Y - A Vertical Roll Pass of Universal Rolling Mill - Google Patents

Abstract

The utility model relates to a vertical roll pass of a universal rolling mill. The upper and lower ends of the vertical roll body are designed as a vertical line segment with a length of 15-50 mm, and the part between the two vertical line segments is designed as an arc concave toward the roll body. segment, the arc height H of the arc segment is 0.2-0.7mm. Since the vertical roll of the universal rolling mill adopts the recessed pass design, the concave degree of the bottom of the high-speed rail is reduced, and the external quality of the rail is improved, so that the high-speed rail produced at a speed of 350 kilometers per hour meets the standard requirements and improves the high-speed rail. The qualified rate of products and the stability of the production process greatly reduce the loss of waste products and have obvious economic benefits. It is suitable for the roll shape design application of the vertical roll at the bottom of the high-speed steel rail rolled by the universal rolling mill.

Description

A Vertical Roll Pass of Universal Rolling Mill

technical field

The utility model belongs to the field of metal pressure processing, in particular to a roll shape of a vertical roll of a universal rolling mill used for rolling the bottom of a high-speed steel rail.

Background technique

Heavy rail is a special steel for railway construction. Heavy rail is divided into three parts: rail head, rail waist and rail bottom according to the cross section. Due to its complex cross-sectional shape, it is very difficult to control the size and specifications during the rolling process. If there is a slight error, problems such as rail height, bottom width exceeding the standard, and asymmetry are likely to occur. Therefore, the pass design and parameter calculation are extremely complicated, and the requirements are very strict. Whether the pass parameter design is reasonable will directly relate to the size specification of the heavy rail and the precision of the product. At present, the units of universal rolling mills are mostly arranged in three stands of UR, E, and UF. When producing 100-meter rails, due to uneven temperature, the bottom of the finished rail bottom is seriously out of tolerance, especially at a high speed of 350 kilometers per hour. Rail, although the standard stipulates that the bottom concave is within 0.3mm, but the maximum concave in actual production reaches 0.5mm, which makes it difficult for the universal rolling mill to produce high-speed rails that meet the standard requirements, thus affecting the qualification rate of high-speed rail products and seriously restricting Production of high-speed rails.

Contents of the invention

The purpose of this utility model is to provide a vertical roll pass design that meets the standard requirements for the bottom of the high-speed rail roll by changing the shape of the vertical roll body of the universal rolling mill.

The technical solution that the utility model takes is:

A vertical roll pass of a universal rolling mill is to change the shape of the vertical roll body, process the pass shape on the flat roll body of the vertical roll, design the upper and lower ends of the vertical roll body as vertical line segments, and the part between the two vertical line segments Designed as a concave arc segment towards the roll body.

The length of the vertical line segment is 15-50 mm.

The arc height H of the arc segment, that is, the height from the line connecting two vertical line segments to the bottom of the arc, is 0.2-0.7 mm.

The beneficial effects of adopting the utility model are:

Since the vertical roll of the universal rolling mill adopts the recessed pass design, the concave degree of the bottom of the high-speed rail is reduced, the external quality of the rail is improved, and the high-speed rail produced at a speed of 350 kilometers per hour meets the standard requirements, which improves the high-speed rail. The qualified rate of products and the stability of the production process greatly reduce the loss of waste products and have obvious economic benefits.

Description of drawings

The accompanying drawing is a schematic diagram of the vertical roll pass of the universal rolling mill.

In the figure: 1 is the vertical roller, 2 is the vertical line segment, and 3 is the arc line segment.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As everyone knows, what the vertical roll of rolling mill of rolling heavy rail generally adopts flat roll body, promptly vertical roll is a cylinder without any pass. As can be seen from the accompanying drawings, the vertical roll 1 of the new universal rolling mill has changed the shape of the roll body, and the flat roll body of the vertical roll 1 is processed with a pass pattern. The shape of the pass is: the upper and lower ends of the vertical roller 1 are designed as vertical line segments, that is, there is still a section of flat roller body at the upper and lower ends of the vertical roller 1, so that the two ends of the vertical roller 1 form a vertical line segment 2; Simultaneously, the part between the two vertical line segments 2 is designed as an arc segment 3 recessed toward the roll body. The specific method is: taking the length of the roller body of the vertical roller 1 as 285mm as an example, a vertical line segment 2 of 30mm is reserved at the upper and lower ends of the roller body of the vertical roller 1, and the length of the remaining part in the middle is 225mm, and then the two ends of the remaining part are used as endpoints to Draw an arc on the side of the vertical roll 1 roll body, and ensure that the arc height of the arc segment 3, that is, the height H from the connection line of the two vertical line segments to the bottom of the arc, is 0.4 mm, and the vertical roll pass of the universal rolling mill of the present utility model can be made.

Claims (3)

1, a kind of universal mill edger roll pass is characterized in that, described edger roll body of roll two ends up and down is vertical line segment, is to the recessed arc of the body of roll between the two vertical line segments.

2, universal mill edger roll pass according to claim 1 is characterized in that, the length of described vertical line segment is 15～50mm.

3, universal mill edger roll pass according to claim 1 is characterized in that, the camber H of the described arc i.e. height that is wired at the bottom of the arc of two vertical line segments is 0.2～0.7mm.

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