DIAGNOSTICS OF ROLLING EQUIPMENT SLIDING BEARINGS

Peculiarities of rolling bearings operation are analyzed. Methods of diagnostics of general purpose sliding bearings and rolling equipment are considered. Direct control of the maximum allowable wear of plain bearings during operation is proposed. It is advisable to provide remote information and consulting services to technical services of metallurgical enterprises for maintenance, repair and operation of crankshaft bearings. Bearings of electric machines of drives of rolls of rolling mills work in extremely difficult conditions with considerable overloads in the environment of the increased vibration. This leads to premature wear of the liner and its fatigue failure. The technical condition of bearings of electric machines of drives of rolls of rolling mills for the purpose of an exception of an emergency stop of production is carried out by indirect control of temperature and vibration. However, these controls do not guarantee an avoidance of an emergency. All problems with working plain bearings can be grouped into three groups: insufficient bearing capacity of the lubricating layer, unregulated clearance between the shaft and the liner, unsatisfactory technical condition of the bearing surfaces. Insufficient bearing capacity of the lubricating layer is more often associated with loss of lubricant properties due to improper maintenance of the lubrication system. The discrepancy between the size of the gap between the shaft and the liner to the normalized value arises from design, technological and operational reasons. Key words: plain bearing; failure; rolling equipment; direct wear control; remote information and consulting services

RESEARCH OF THE EFFICIENCY OF THE ORGANIZATION OF THE MARINE FERRY LINE

The article considers the statistical data on freight ferry lines in the Baltic Sea region, studies the features of transportation of rolling equipment by ferries, analyzes the main indicators of the effective operation of a ferry line and determines the initial data on the workload. Key words: ferry transportation, rolling equipment, cargo traffic, cargo capacity, workload.

Necessity in development of sheet rolling theory, taking into account nonstationarity of technology and negative dynamic effects

The analysis of the existing modern problems of rolling production related to the need to take into account the nonstationarity of technological parameters and negative dynamic effects for calculating of power parameters and designing of technology and rolling equipment is performed. Theoretical substantiation and research results confirming their relevance are proposed.

Investigation of deformation of shell with waffle reinforcement during rolling and development of method for compensation of deviations forms

When the waffle panel of AMg6 alloy rolls into the cylindrical shell, a shape defect occurs. Manual elimination of this defect causes local irregularities on butt welded edges of the waffle shell. This leads to difficulties in the process of welding by friction welding with mixing of shells in the section of fuel tanks. It is necessary, on the basis of computer analysis and existing theories, to determine the stresses in the waffle shell that cause internal deformations that result in a general shape error, and to derive patterns under which external influence on the geometry of the mold at the time of bending is possible. The proposed campaign will make it possible to determine auxiliary technological elements for setting standard rolling equipment for defective rolling of wafer shells of missile fuel tanks with various geometric versions of reinforcements. It, in turn, will increase the efficiency of forming shells and the quality of welds when they are welded