A method for all-purpose four-roll finished pass rolling rail
A finished pass, universal rolling technology, used in metal rolling, metal rolling, metal rolling stands, etc., can solve the problem of large dimensional changes in rail height, difficulty in ensuring shape and surface finish, and bending of final rolling passes. Insufficient control means and other problems, to achieve the effect of ensuring shape and surface finish and ensuring surface quality
Active Publication Date: 2020-02-07
BAOTOU IRON & STEEL GRP
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Problems solved by technology
The height and dimension of the front end and tail end of the rail vary greatly, the top surface of the rail is filled freely, the shape and surface finish are difficult to guarantee, and the bending control means of the final rolling pass are insufficient
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[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] Please refer to Figure 1 to Figure 5 , the present invention provides a kind of all-purpose four-roll finished pass method of rolling rail, and it comprises the following steps:
[0024] The rectangular steel billet is opened after rough rolling for several passes to form a universal rolling billet section 2-5 with the following dimensions: the width of the top of the rail head is T5, the width of the rail head is D5, the height of the rail head is B5, and the rail head The side height dimension is A5;
[0025] Through the universal rough rolling pass 2-4 and the rough rolling pass 2-3 reciprocating rolling for several passes: through the universal rough rolling pass 2-4, the height of the rail head is reduced to B4, and th...
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The invention discloses a method for rolling out a steel rail through universal four-roll finished product passes. The method comprises the following steps that a rectangular steel blank is subjected to cogging after being subjected to multiple passes of cogging and rough rolling; rolling is carried out through the universal rough rolling pass and the rough edging pass in a reciprocating manner by multiple passes; the size is precisely controlled through finish edging; and the size is controlled by adjusting a roll gap through the universal finished product passes, and the roll gap of universal finished product pass steel rail head rolls is arranged on the side face of a rail head. The four-roll universal mode is adopted in the finished product passes, the position of the roll gap is reasonably arranged, and therefore the basic size of the steel rail and the surface quality can be guaranteed, normal use of the steel rail cannot be influenced, the characteristics of the rolling process are met, and normal use and maintenance of a user are guaranteed. Due to the addition of direct compression in the final pass height direction, changes of the rail height sizes of the front end and the rear end of the steel rail are reduced, the top face of the steel rail is limited by a tool, the shape and surface smoothness are guaranteed, and final pass bending control can be adjusted through the height-direction rolling reduction.
Description
technical field [0001] The invention relates to the technical field of rail rolling, in particular to an all-purpose four-roller finished pass rolling method for rails. Background technique [0002] At present, the finished pass adopts the three-roll universal mode. The rectangular steel billet forms a universal rolling billet section after several passes of billet opening and rough rolling, and rolls several passes in the universal rough rolling and rough rolling pass to control the shape and size of the section. , and then the finished rail is rolled out by finishing edge rolling and universal finished pass. The rail height at the front end and tail end of the rail varies greatly, the top surface of the rail is filled freely, the shape and surface finish are difficult to guarantee, and the bending control means of the final rolling pass are insufficient. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a m...
Claims
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IPC IPC(8): B21B1/085B21B37/58
CPCB21B1/085B21B37/58B21B2261/04B21B2261/06B21B2271/02
Inventor 王永明
Owner BAOTOU IRON & STEEL GRP