Plain-barreled roll rhomboidity rolling method

Abstract

The invention relates to a plain-barreled roller skew rolling method, belonging to the steel rolling technical field, which aims to solve the molding rolling problem by adopting an unpunched plain-barreled roller rolling a workpiece. The invention uses continuous casting blank of square cross section as raw materials in two steps: a plain-barreled roller skew rolling step and a diamond-square hole rolling step. The invention adopts unpunched plain-barreled rolling in the step of the plain-barreled rolling; the skew degree of the workpiece is produced by controlling press distance and using inclined guide device through 4 to 8 pass rolling; the workpiece obtains a diamond-shaped cross section as the incremental skew degree. Then the diamond-square hole rolling step adopts diagonal square hole, diamond-shaped hole and diagonal square hole in sequence through three pass rolling, obtaining a workpiece of regular square cross section. The invention has the advantages that: the designing idea is quite the reverse of the present plain-barreled roller rolling method, skillfully utilizes the skew degree of the workpiece produced by the plain-barreled rolling and enables the workpiece to form a diamond-shaped cross section; then go to the diamond-square hole rolling step to produce the square steel. The invention resolves the difficult problem of the workpiece distortion and turnover in prior plain roller forming process.

Description

technical field [0001] The invention relates to a steel rolling method, in particular to a method for rolling square steel with a square-section continuous casting slab and rolling bars and wires in the rough rolling stage using flat rolls for off-square rolling, which belongs to the technical field of steel rolling. Background technique [0002] Flat roll rolling is a new rolling technology, which refers to the use of flat rolls without holes to form and roll the rolled piece. The flat roll rolling technology has been researched and reported at home and abroad since the 1980s. This technology has remarkable effects in reducing rolling costs, improving rolling mill efficiency and reducing rolling energy consumption. The main problem of the existing flat roll rolling technology is that in the rolling process, due to the use of flat rolls without side wall restrictions, the rolled piece is prone to skew, that is, "off-square" or even inverted steel. If the amount of square re...

AI Technical Summary

Problems solved by technology

The main problem of the existing flat roll rolling technology is that in the rolling process, due to the use of flat rolls without side wall restrictions, the rolled piece is prone to skew, that is, "off-square" or even inverted.

In order to solve the above problems, methods such as penetrating guide plates and rolling guide plates are used in flat roll rolling. restricted

Images