Research And Exploitation On The Prediction System Of Force & Energy In Hot Strip Rolling

The thesis is supported by Strip factory of Tangshan Steel and Iron Group Stock Ltd. At present because of without thickness self-controlled system on narrow strip production line, the dimension precision of product is still relied on the manipulator's experience. It results in low shoot rate and bad product quality. The question is extrusive especially wider or thinner products are tried exploiting on the strip product line. Under current circumstance therefore improving the dimension precision of product through accurately predicting the rolling force is the urgent target for strip-company in order to increase economy benefit and keep continuance development.The warp of calculation result of force and energy in continuous strip rolling, whether it is calculated by theoretical model or experiential or semi-experiential model, is too great. So it cannot supply the need of high precise for rolling product. On the basis of the machine and technology condition of Tangshan strip factory and finishing investigating all kinds of calculate model and methods, a system software of predicting force and energy in continuous strip rolling is exploited. The modified function of considering austenite recrystallization change is performed for the first time in this software; it can obviously improve the predicting precise. Furthermore the influence of geometry parameter in distortional section on arm coefficient is considered in calculating of rolling moment, which makes results agree with the fact values.The conclusions are as follows:1. Through the research on recrystallization disciplinarian of narrow strip, the results are agreed well with measured values. It shows that it is feasible when investigative model is used in strip continuous product line. It also performs theoretical base in controlling and predicting the structure and property of narrow strip.2. The influence of remnant strain because of not enough recrystallization on rolling load is considered for the first time in computing of rolling force, it can obviously improve the predicting precise. The predicted height of work piece is also accorded with the measured values using the result. It shows that controlling dimension precise can replace the method of"test modification"and offer the base for technology design and factual manipulation in exploiting new products.3. Through researching and calculating of temperature and height warp between head and tail of work piece, the calculating values is basically agreed with the measured values on spot. The precise of strip products can be improved, which can be used for broad strip if the results are using in controlling the whole strip dimension.4. For protecting the equipment's safety, it's unsuitable for whether broad strip or narrow strip to improve curve weight by increasing work-piece length at current deformation regulations in narrow product line.