Abstract
An important role of railway transport in the road transport complex of Ukraine is highlighted. It is noted that in the current conditions of management, competition from other modes of transport and foreign railway companies, the problem of constant increase in the efficiency of rolling stock use, the overwhelming majority of which falls on the freight wagon fleet, is acute before the domestic railways. The urgency of increasing the reliability of the domestic fleet of freight cars is substantiated. The role of welding production in the creation of new and modernization of existing freight cars is singled out. The expediency of replacing the method of cold dressing of post-welded deformations that arise in the manufacture of technologically deformed upper girders of open-top wagons is substantiated, the method of thermal unstressed straightening. The results of mathematical modeling of the process of thermal straightening of technologically deformed top girders of open-top wagons are presented.
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