Rolling mill transmission system key component fatigue life early warning method based on load spectrum analysis

Abstract

The invention discloses a rolling mill transmission system key component fatigue life early warning method based on load spectrum analysis. The method is characterized by comprising the following steps: 1, obtaining a rolling mill transmission system key component load spectrum through real-time monitoring in a rolling mill working process; 2, based on a computer simulation technology, obtaining a stress distribution and conversion coefficient of a rolling mill transmission system key component; 3, obtaining a corresponding stress spectrum by performing conversion processing on the load spectrum measured in the first step; 4, compiling an equivalent stress amplitude histogram by performing statistics on the stress spectrum after processing in the third step by use of a cyclic rain flow counting method; and 5, calculating fatigue life circulation frequency of a transmission part by use of a correction Miner method, and converting the fatigue life circulation frequency into a fatigue life taking a year as a unit. The method solves the problems of large calculation amount and high calculation complexity in a conventional fatigue life calculation method, has quite high applicability and operability and is high in engineering practicality.

Description

technical field [0001] The present invention relates to metallurgical machinery, metal structure fatigue life calculation related technical field, especially a kind of part life prediction method, specifically a kind of fatigue life early warning method of the key parts of rolling mill transmission system based on load spectrum analysis, it is especially suitable for It is used to calculate the fatigue life of key components of the rolling mill transmission system during the rolling process. Background technique [0002] The rolling mill drive system is an important component of the rolling mill, and its strength and stability directly affect the normal operation of the rolling mill. During the rolling process of the rolling mill, when the rolled piece is bitten and thrown out, the rolling mill will bear a huge impact torque load, which will cause fatigue damage to the transmission system of the rolling mill. Once the components of the transmission system of the rolling mil...

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Problems solved by technology

[0004] The purpose of the present invention is to carry out the calculation and analysis of the fatigue life with the steady-state rolling torque or the rated torque of the main motor as the load in the fatigue damage research of the key parts of the existing rolling mill transmission system, and the load spectrum and The actual load spectrum of the rolling mill is inconsistent, which easily leads to a large error between the estimated life and the actual situation. A fatigue life early warning method for key components of the rolling mill transmission system based on load spectrum analysis is invented to effectively, quickly and accurately Fatigue Life Prediction of Key Components in Rolling Mill Transmission System

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