Method for rolling angle steel

Abstract

The invention relates to a method of rolling angle iron, especially a method of producing angle iron by changing the bore shape and then lengthening the center line of blank. The method is as following: first, roll lesser rectangle semifinished-product with some model W bores, then repair them with model W repairing bores, gradually rolling the two sides of the model W rolled piece into arc segment and level segment as papilionaceous bore. Then send them into the papilionaceous bore to roll bigger specification angle iron. The shapes for rolling orderly are: vertical rolling box hole, W cutting hole, W repairing hole, angle steel papilionaceous hole, angle steel finished product hole. With W bore used for rolling the angle steel, the breath is enlarged. Using W bore to roll equilateral angel steel can not only reduce the slot depth, strengthen the rolling steel, reduce wastage, but also can make big scale angle steel with small blank. With the same blank, the invention can make many kind angle steel so it can help factory improve ability to be adapted to the market and benefit.

Description

Technical field: [0001] The invention relates to a method for rolling angle steel, in particular to a method for producing angle steel by increasing the length of the center line of a billet through the change of pass type. Background technique: [0002] At present, people usually use box-shaped holes and cutting holes to directly cut rectangular billets into butterfly holes or use diagonal rolling to gradually cut square billets into butterfly holes. These two methods of rolling angle steel require rolling The billet used for making angle steel is large enough to cut enough leg length through several cutting holes to meet the centerline length required for rolling angle steel; usually, the product should be included in the billet section regardless of the minimum size of square billet or rectangular billet. If the billet is small, it is difficult to roll out larger-sized angle steels with the method for rolling angle steels of the background technology; due to the reasons f...

AI Technical Summary

Problems solved by technology

If the billet is small, it is difficult to roll out larger-sized angle steels with the method of rolling angle steels of the background technology; Due to the reasons for the billets, the development of angle steel varieties in some production plants cannot be rolled out with smaller-sized steel billets. Specification of angle steel, which affects production and economic benefits

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