Rolling process design method for large-specification bar

Abstract

The invention discloses a rolling process design method for a large-specification bar, and belongs to the technical field of rolling process design and optimization of large-specification bars. The method comprises the following specific operation steps: (1) establishing a geometric model; (2) analyzing process parameters; and (3) analyzing roller abrasion. According to the method, a process is optimized through numerical simulation, so that a pass reduction rate, a pass elongation coefficient and pass rolling pressure are more uniform; the optimized rolling process improves pile-pull coefficients of front and rear racks, and improves the stability in a production process; and by means of the optimized rolling process, a abrasion degree of a roller is improved to a certain degree, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of rolling process design and optimization of large-sized bars, and relates to finite element analysis of the production process of large-sized bars; more specifically, it relates to a rolling process design method of large-sized bars. Background technique [0002] At present, most of the large-scale alloy bars on the market are high-quality alloy structural steels, which have good hardenability, high tensile strength, toughness and fatigue strength, and are mostly used in the manufacture of steel for oil well drilling pipes. Therefore, it should be strictly controlled in production to ensure product quality; however, due to the downturn in the steel industry market in recent years, the following shortcomings have emerged: In the formulation of the rolling process, the normal bite of the rolled piece cannot be guaranteed, resulting in deformation If the distribution is uneven, there will be disadvantages suc...

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Problems solved by technology

Therefore, it should be strictly controlled in production to ensure product quality; however, due to the downturn in the steel industry market in recent years, the following shortcomings have emerged: In the formulation of the rolling process, the normal bite of the rolled piece cannot be guaranteed, resulting in deformation The distribution is uneven, so there will be defects such as uneven pass wear, inconsistent material shape and size, poor surface quality and uneven rolling load distribution.

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