Based On The Secondary Development Of Abaqus Function Of Hot Strip Mills Roughing Mill Group For The Development Of Simulation System Of Steel Rolling

Hot strip rolling process is a problem of the large deformation elastoplasticand multiple nonlinear, which is difficult to be describedt by exact mathematical.With the extensive application of computer technology, people usually use thefinite element numerical simulation techniques to improve the quality of thestrip. However, the finite element software contains many problems, such ashigh level of theory to user, complexity modeling of pre-processing,inconvenience of extracting information for post-processing, all that are limitingthe finite element software to be widely used in the SME. In order to solve thisproblem, this thesis bases on the finite element software ABAQUS, uses thesecondary development to develope the rolling simulator system for striphot-rolling roughing mill group. The system has functions of parametricmodeling, submitting multiple jobs, easy selecting output items, friendlyinterface, all of these are easy to be used, and greatly shorten the time ofdevelopment cycle of modeling. The main contents of this thesis are as follows:Firstly, the simulation system of steel rolling is based on ABAQUS solverto research a1500hot strip mill group, and uses the elastic-plastic finiteelementmethod for dynamic simulation, the modeling of Rough Rollingslabrollingprocesswasestablished.The pre-processing and post-processingkernel scriptswere parameterized bysoftwarescripting interface.Secondly, the rolling simulation system builds GUI by a custom application,and then modifies the environment file and kernel scripting language-Python tocreate a new function module, still does parametric modeling of pre-processingand constructs job submit module. In the pre-processing module of the rollingsystem, the slab’s length, width, height, material property, the roller sizes,rolling temperature, vertical roll reduction, horizontal roller reduction can beachieved with parametric design and generated automatically and all of rollingprocess jobs. Still, the created first pass and first-second pass models ofpre-processing module should be verified. Multiple*.inp files were selected and submitted by the job module, sequentially calculated submitted in turn, andgenerated results file for post-processing analysis.Finally, the system aims at improving slab produce efficiency, includingresearching width loss and head of slab and fish-tail shape of hot strip RoughRolling for amending the width loss, and fish-tail deformation of head and tailon unsteady rolling stage, to reduce kerf of slab head and tail. By usingPost-process module, the width loss, fish-tail length of unsteady rolling stageand dog-bone height, the X-Y data of width loss length at head and tail ends,generating X-Y chart can be extracted. After analysising results of edger rollingand edger-horizontal rolling, and then comparing with theoretical andexperimental data, we get the results that basically reflect regulation of theimportant parameters infect the slab width spreading tendency, and verify thereliability of the system.