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1问题的提出2005年11月,苏家屯车辆段在段修验收过程中发现了2起既有铁路120 km/h提速改造车辆错装了图号为QCZ85—40—02的下心盘(下心盘立边外侧无8 mm×8 mm倒角)事件。下心盘错装后,无法保证上心盘铆钉头部与下心盘立边间有足够的间隙,给行车安全带来了隐患。为此,笔者对苏
1 Proposal In November 2005, Sujiatun depot in the segment repair process found two existing railways 120 km / h speed up the transformation of the vehicle with the wrong map No. QCZ85-40-02 under the heart plate (under the heart There is no 8 mm × 8 mm chamfer on the outside of the flange.) Under the wrong heart plate installed, can not guarantee the center plate rivets head and the lower edge of the vertical flange between the sufficient gap, traffic safety has brought hidden dangers. To this end, the author of the Soviet Union