Rolling process design method for large-specification bar

A process design and large-size technology, which is applied in the field of rolling process design of large-size bars, can solve the problems of uneven rolling load distribution, inability to ensure the biting of rolled pieces, inconsistent material shape and size, etc., and achieve improved stacking The effect of improving the tensile coefficient, the uniformity of the temperature field distribution, and the degree of wear

Pending Publication Date: 2022-01-14
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Rolling process design method for large-specification bar
  • Rolling process design method for large-specification bar
  • Rolling process design method for large-specification bar

Examples

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Effect test

Embodiment 1

[0035] During rolling, the change of the rolling force between the stands can infer the change of the stacking relationship of the rolled piece between the stands; figure 2 is the change of rolling force in each pass before and after optimization; figure 2 It can be seen that the optimized rolling force change of the finishing rolling process is more uniform than that before optimization. The analysis of the rolling force change is as follows:

[0036] When the existing finish rolling process is rolled, the rolling pressure of the first pass drops when the second pass bites, so it shows that there is drawn steel between the 1st and 2nd stands; , the rolling force of the second pass also decreased, so it shows that there is drawn steel between the 2nd and 3rd stands. The situation of the other passes is the same; the degree of pulling the steel in the last few passes is weakened, especially when the 8th pass bites, the rolling force of the 7th pass drops very little, so it s...

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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...

Claims

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Application Information

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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 唐鑫章小峰李佑河黄贞益席波唐立志邢梅林方敏
Owner NANJING IRON & STEEL CO LTD
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