In this thesis I presented rolling technology of flat bars in rolling mill owned by company Štore Steel d.o.o. I analysed the working process of continuous rolling mill. In more detail I analysed rolling plan of nine bars with final rectangular cross section profile 65 mm x 30 mm and followed changes from the beginning to the end of the forming process. During the forming process of above mentioned bars, I took out three samples. The first two samples were rolled at different speed, on the basis of which I was studying the impact of rolling speed on final product's dimension. Third sample was a pre-profile of the final product, collected between fifth and sixth rolling stand. With specialised industrial measuring device PROFILEMASTER SPS 400 and handheld digital meter I checked the dimensional accuracy of bars and samples. Measurement of temperature of the samples during the forming process was done/made with handheld pyrometer. Results of the measurements were later used in theoretical calculations. With known dimensional parameters, rolling speed, size of working rolls and measured temperature, I made theoretical calculations of lateral spread according to Bakhtin's formula and Tafel and Sedlaczek's formula. In results I described impact of rolling speed on lateral spread and presented cross sectional profile analysis. I compared the heights of programmed rolling gap and actual rolling gap on each rolling stand. Furthermore I made analysis of final pass on the last rolling stand and gave statistical overview of dimension data for entire rolling plan.
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