Can ÖZSOY, Ertan ÖZNERGİZ

Sıcak haddeleme prosesinin deneysel modellenmesi

Bu çalışma iki kısımdan oluşmaktadır. İlk olarak, sıcak haddeleme prosesinde haddeleme kuvveti, momenti, kütük sıcaklığı ve hadde sıçraması için deneysel modelleme yapıldı. Basamak cevabı formunda olan bu modelde haddeleme kuvveti ve momenti için paso, giriş sıcaklığı, kütük genişliği, hadde çapı ve karbon eşdeğeri; kütük sıcaklığı için giriş sıcaklığı ve enerji; hadde sıçraması için de paso, kuvvet ve kütük genişliğim kullanarak daimi rejim değerlerini hesaplamaktadır, ikinci olarak, dinamik model ile sıcak haddeleme proseslerinde yaygın olarak kullanılan ve katlı lineer regresyon yöntemini kullanan klasik ampirik modeller karşılaştırıldı. Modelleri geliştirmek için kullanılan veriler, Ereğli Demir Çelik Fabrikaları 2. sıcak haddehanesi tersinir kaba haddeleme tezgahından sağlanmıştır.

Experimental modeling for hot rolling system

This study consists of two parts: In the first pan, experimental roll force, torque, slab temperature and roll deflection modeling of a plate hot-rolling is represented. The structures of these models are the step-response forms and predict the steady-state values of roll force, torque, temperature and deflection. In this study; for roll force and roll torque models; draft, temperature, slab width, roll diameter, carbon equivalent, for temperature model; temperature and energy, for deflection model; draft, roll force and slab width are used as input. The step response model parameters are estimated via recursive least square (RLS) estimation algorithm by using input information related to the past. In the second part, the proposed dynamical models are compared with the classical empiric models commonly used by several author in the rolling practice. It has included mathematical models relating rolling force and torque to the deformation resistance of the work piece in the roll gap; models of heat transfer via radiation, convection and conduction processes and for the deflection model rolling mill force and slab width are used. For empiric model, Sims' formulae, in discrete-time form with multiple linear regressions method is used. The experimental data obtained from Ereğli Iron and Steel Factory was used for developing both of the models.

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