Low-cost production method of shared hole pattern of channel steel and I-shaped steel

Abstract

The invention discloses a low-cost production method of a shared hole pattern of channel steel and I-shaped steel. The low-cost production method comprises the steps that 1, the I-shaped steel and the channel steel are of two adjacent specifications with the waist width difference within 20 mm; 2, after a blank is heated to the process temperature, the blank is rolled for 3-5 passes in a BD rolling mill; 3, the last pass on the BD rolling mill must be a bone-shaped control hole pattern; 4, the first 2-3 passes of a finishing mill group are the shared hole pattern, and the width of a rolled piece is controlled to be the middle width of the waist width of finished products of the two specifications, wherein the hole pattern adopted by the I-shaped steel and the hole pattern adopted by the channel steel are as follows: as for the I-shaped steel, the first two hole patterns of finish rolling are shared, the second pass is an H-shaped hole pattern of a universal rolling mill, and after the third pass, different hole patterns are adopted to roll the rolled piece into the required I-shaped steel finished product size; and as for the channel steel, the first two universal rolling mills for finish rolling are assembled into a two-roller rolling mill, the first three hole patterns are shared and are butterfly-shaped hole patterns of the two-roller rolling mill, two true legs on the upper edge of the rolled piece are rolled into two false legs, and after the fourth pass, the rolled piece is rolled into the required channel steel finished product size through different hole patterns.

Description

technical field [0001] The invention relates to a low-cost production method for channel steel and I-beam common pass. Background technique [0002] Both hot-rolled I-beams and channel steels are carbon structural steels for construction and machinery. They are section steels with complex sections. Long strips of steel are mainly used in tunnel culverts, water diversion projects, building structures, curtain wall projects, mechanical equipment and vehicle manufacturing. The traditional channel steel is rolled with a two-roll mill and a butterfly pass, and the I-beam is usually rolled with a blanking mill (hereinafter referred to as: BD mill) combined with a universal rolling mill. Usually there is a set of roll tooling for each specification and variety. Some profile factories can make the rolls of the blanking machine common between two adjacent specifications of I-beam or channel steel. Standard rolling, this production method has high costs for rolls and tooling, and ta...

AI Technical Summary

Problems solved by technology

Usually, there is one set of roll tooling for each specification and variety. Some profile factories can make the rolls of the blanking machine common between two adjacent specifications of I-beam or channel steel. Standard rolling, this production method has high costs for rolls and tooling, long product change time, large workload for changing roll tooling, and high production costs

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