CN201244573Y

CN201244573Y - Universal rolling mill vertical roll hole type

Info

Publication number: CN201244573Y
Application number: CNU2008200148210U
Authority: CN
Inventors: 张金明; 王忠强; 刘鹤; 王东溟
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2008-08-13
Filing date: 2008-08-13
Publication date: 2009-05-27
Anticipated expiration: 2018-08-13

Abstract

The utility model relates to a vertical roll hole structure for a universal mill. The upper end and the lower end of a roll body of a vertical roll are designed into vertical line segments with the length between 15 and 50 mm. A part between the two vertical line segments is designed into arc segment dented towards the roll body. The arc height H of the arc segment is between 0.2 and 0.7 mm. Because of the design of the dented hole structure adopted by the vertical roll of the universal mill, the recessed degree of the rail bottom of high-speed steel rails is reduced, the outside quality of the steel rails is improved, the produced high-speed steel rails with the speed of 350 km per hour reach the standard requirement, the product qualification rate of the high-speed steel rail and the stability of the production process are improved, the rejected production loss is greatly reduced, and the vertical roll hole structure has obvious economic benefit. The vertical roll hole structure is suitable for the design and the application of the roll structure for the vertical roll of the universal mill for rolling the bottom of the high-speed steel rails.

Description

A kind of universal mill edger roll pass

Technical field

The utility model belongs to the stress metal manufacture field, is specifically related to a kind of roll shape that is used for the universal mill edger roll of rolling high speed rail foot.

Background technology

Heavy rail is the special steel of railway construction, and heavy rail is divided into rail head, the web of the rail and the flange of rail three parts by the cross section.Because its section configuration complexity, in the operation of rolling dimensions control very difficult, problem such as have slightly that the rail height very easily appears in mistake, bottom width exceeds standard and asymmetric.Therefore, pass designs, calculation of parameter is complicated unusually, also require very strictness, and whether the pass parameter designing rationally will be directly connected to the dimensions of heavy rail and the precision of product.At present, the unit of universal mill adopts UR, E, UF three frames to arrange more, when producing hundred meters rail, because the temperature inequality causes the bottom of the finished product rail flange of rail recessed overproof serious, especially the high speed rail of 350 kilometers of speed per hours, though regulation bottom is recessed in 0.3mm in the standard, and the maximum recessed 0.5mm that reaches in the actual production, the high speed rail that causes universal mill to be difficult to produce to reach standard-required, thereby influence the qualification rate of high speed rail product, seriously restricting the production of high speed rail.

Summary of the invention

The purpose of this utility model just provides a kind of by changing universal mill edger roll body of roll shape, thereby produces the edger roll pass design that reaches recessed standard-required at the bottom of the high speed rail roller.

The technical solution of taking of the present utility model is:

A kind of universal mill edger roll pass is to change edger roll body of roll shape, is processed with pass on the straight barrel of edger roll, and the edger roll body of roll is designed to vertical line segment in two ends up and down, and the partial design between two vertical line segments becomes to the recessed arc of the body of roll.

The length of described vertical line segment is 15～50mm.

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.

The employing the beneficial effects of the utility model are:

Because after the universal mill edger roll adopts recessed pass design, reduced the recessed degree of high speed rail flange of rail portion, improved the external mass of rail, make 350 kilometers high speed rails of speed per hour of production reach standard-required, the product percent of pass of high speed rail and the stability of production technology have been improved, greatly reduce loss due to spoiled work, had tangible economic benefit.

Description of drawings

Accompanying drawing is a universal mill edger roll pass schematic diagram.

Among the figure: 1 is edger roll, and 2 is vertical line segment, and 3 is arc.

The specific embodiment

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

As everyone knows, what the milling train edger roll of rolling heavy rail generally adopted is straight barrel, and promptly edger roll is a cylinder and do not have any pass.By accompanying drawing as seen, this novel universal mill edger roll 1 has changed the shape of the body of roll, is processed with pass on the straight barrel of edger roll 1.Its pass is shaped as: edger roll 1 body of roll is designed to vertical line segment in two ends up and down, and promptly edger roll 1 body of roll still leaves one section straight barrel in two ends up and down, makes edger roll 1 two ends respectively form a vertical line segment 2; Simultaneously the partial design between the two vertical line segments 2 is become to the recessed arc 3 of the body of roll.The concrete practice is: 1 barrel length 285mm is an example with edger roll, the vertical line segment 2 of 30mm is respectively reserved at two ends about edger roll 1 body of roll, the intermediate rest partial-length is 225mm, be end points with the remainder two ends then, to the inboard arc of drawing of edger roll 1 body of roll, and the camber that guarantees arc 3 promptly the height H that is wired at the bottom of the arc of two vertical line segments be 0.4mm, can make the universal mill edger roll pass of the utility model.

Claims

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.