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运用条件的变化、货物品种构成的重新分配、装卸机械的广泛采用、调车作业和驼峰溜放速度的提高以及货物列车总重和货车轴重的增加,所有这些已使四轴敞车车体的损坏不断增多。端底架一端门、自动车钩铆接从板座、中梁安装从板座和心盘的部位都经常发生损坏。采用相应改变角立柱结构的端墙代替端门来加强端底架以及采用专门结构的焊接从板座代替铆接从板座是提高敞车运用可靠性和缩短敞车在检修中的停留时间的方法之一。乌拉尔车辆制造工厂在1979年底按照12
Changes in the conditions of use, the redistribution of the composition of the cargo species, the widespread adoption of loading and unloading machinery, the increased shunting operations and the increased hump speed and the increase of the total freight trains and the increase of the axle load of the wagons have all contributed to the Damage is increasing. One end of the end chassis door, automatic riveting hook from the board seat, the beam installed from the board seat and the heart plate parts are often damaged. One of the methods to improve the reliability of the gondola and shorten the stay time of the gondola in the overhaul is to replace the end bracket with the end wall instead of the end door and to replace the rivet from the plate seat with the special structure of the welding . Ural vehicle manufacturing plant at the end of 1979 according to 12