Performance Analysis And Improvement Of Roller Box’s Parts In High Speed Pre-finishing Mill

The wire rod plays more and more role in the national economy, and it is widely used.In recent years,highspeed wire rod yield increased rapidly in our country with a large number of excess capacit.In order to improve efficiency,the manufacturers try their best to reduce equipment failure rate, reduce costs.In this paper, we take Pre finishing mill roll box with highspeed wire rod as the research obiect. At first we discusse the situation of highspeed wire rod of development situation at home and abroad.we also process layout the structure composition of pre finishing mill of highspeed wire rod and its function and structural characteristics and the pre finishing mill roll box parts damaged due to the original and fault features were analyzed, The parameters such as the roller shaft strength, oil film bearing parameters, the thermal expansion amount of the roller ring and cone sleeve were checked and calculated by the 15# rolling mill roll box, and the oil film bearing oil products were detected.Metallographic examination and Analysis on the fracture of the roll gap adjustment device of the pre finishing mill.Secondly, finite element analysis is used to analyze the finite element calculation of the improved roller shaft, the improved front and the improved screw support assembly and the improved fixed roll ring. Through the calculation and analysis, it is showed that the strength of the improved roller shaft meets the requirements, and the improvement of the screw assembly strength is better than that of the structure.Finally, in the main parameters of the pre finishing mill roll box calculation check and finite element analysis based on, and analyzes the cause for pre finishing mill roll box continuous burning main reason for pre finishing mill roll box assembly structure improvement of a number of measures, and the production run to verify the effect of the improved obviously of by.Through the improvement and box sealing, solve and a large number of box water problem; through the regulating screw rod is improved to roll box and gap, the frequency of the wire rod fracture failure in the past month 7-8 times, now reduced to every year 1times; through the improvement of fixed and ring cone sleeve, pre finishing mill of tungsten carbide roll ring and cone sleeve of the non normal consumption reduced to the original 10%, reduce the roll ring, pre finishing, finishing mill taper sleeve spare parts usage. Through pre finishing mill roll box component performance improvement, the BayiSteel Wire pre- finishing rolling mill equipment accident rate decreased more than 80%have been substantially reduced, the utilization rate of the equipment is greatly improved,the cost of materials consumed decreased significantly, the operating system more stable.