Blooming down-the-hole pattern design method used on continuous rolling mill

Abstract

The invention discloses a blooming down-the-hole pattern design method used on a continuous rolling mill, belongs to the technical field of steel rolling, and aims at the current situation that the utilization rate of an existing roller body is low, and the blooming down-the-hole pattern design method comprises the specific steps that under the condition that the inclination of the side wall of anexisting hole pattern is not changed, the grooving depth of the existing hole pattern is reduced; according to the grooving depth of the down-the-hole patterns and the number of the down-the-hole patterns, the roll collar width of the edge of the roll is obtained; the number of the down-the-hole patterns distributed on the roller needs to meet the requirement that S is larger than or equal to h;and under the condition that the working diameters of the rollers are the same, the diameters of the rollers are determined according to the grooving depth of the down-the-hole pattern. On the premisethat the rolling quality of special steel products is guaranteed, an existing hole pattern is designed into a down-the-hole pattern, the grooving depth of the hole pattern on the roller is reduced byhalf, then the groove bottom of the hole pattern is located at the position with a high hardness layer, the requirement for the steel passing amount of the roller is met, and the use cost of the roller is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a design method of a submerged hole profile for blooming used in a continuous rolling mill. Background technique: [0002] In the field of rolled steel and long product production, in order to reduce the consumption of rolls, various production enterprises have used many innovative methods in pass design. The typical one is to use flat roll without pass rolling to replace the box-type rolling of the continuous rolling mill. —Ellipse-circle pass system rolling effectively reduces the steel consumption per ton of rolls. However, since flat roll non-perforated rolling forms sharp corners during the deformation process, it is easy to form surface folding defects in the subsequent transition to a round process. It is used for building materials that do not require high surface quality, and is not suitable for the production of special steel products. In the use of...

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Problems solved by technology

[0006] (2) The utilization rate of the roll body is low

[0007] Due to the deep groove of the box-type pass, when the slope of the side wall of the pass is fixed, the width of the outer opening of the pass is large. When the pass is arranged, the length of the roll body is occupied. low rate

[0008] (3) The roll is heavy

[0009] Due to the deep groove of the box-shaped pass, the difference between the roll body diameter and the working diameter of the roll is large. Therefore, under the premise of ensuring the working diameter of the roll, the roll body diameter of the roll is also relatively large, which increases the weight of the roll.

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