Slot-less rolling technique of rolling section

Abstract

A fluteless rolling technology for rolling steel section includes sequentially determining 14 technological parameters including total cross-section shrinkage ratio of the workpiece to be rolled, the pressing down size of each pass, total number of passes, 5 correcting coefficients, etc, and rolling by fluteless rolling mill while regulating the clamp to the workpieces.

Description

technical field [0001] The invention belongs to a steel rolling process using grooveless flat roll rolling in a steel rolling mill, in particular to a grooveless steel rolling process for rolling profiles. Background technique [0002] The process of rolling steel with grooveless flat rolls in the rolling mill means that the rolled piece is rolled between two flat rolls. The height of the roll gap is the height of the rolled piece, and the width of the rolled piece is the width of the rolled piece after free expansion. Some use rolls with grooved holes to clamp and participate in the deformation of the side wall of the rolling groove when rolling steel. The use of grooveless flat rolls for rolling bar and section steel products can simplify the force of the rolled piece, uniform deformation, and help to improve the surface quality of the rolled piece. The section size of the rolled piece can be adjusted only by changing the roll gap during rolling, and the rolling adaptabil...

AI Technical Summary

Problems solved by technology

[0003] In foreign countries, Western steel companies such as Morgan Corporation in the United States have conducted a long-term test and exploration of the grooveless flat roll steel rolling process, but due to the unreasonable design of the rolling parameters, they can only carry out experimental rolling on a few rolling mills , and up to now it is still unable to effectively solve the problem of stripping and torsion of the rolled piece when it is rolled, resulting in many quality problems of the rolled piece, which restricts the large-scale factory production of grooveless rolled steel

[0004] The fundamental reason why the above problems are difficult to solve is that so far, in the steel rolling industry, the width of the rolled piece after rolling with grooveless rolls has not been accurately determined, and there is no way to take effective measures to ensure that in the subsequent passes Locate the rolling stock and carry out effective rolling