论文部分内容阅读
在铁路施工中,有些旧隧道的加固工程需要用废钢轨弯曲成同隧道断面形状相同的钢拱架进行加固,但在实际工作中,隧道形状变化较大,生产批量又不多,工期要求短,所以不可能预先在大的工厂去成批加工。下面介绍一种较理想的弯曲方法。这种方法能因地制宜随时改变拱架形状,工效高,速度快,制作工艺简单易行。这种方法是基于限制钢轨弯曲时在横向出现扭曲变形,使未加工部分处于自由状态,而加工部分靠附加的冷态背轨对被弯曲钢轨产生
In the railway construction, some old tunnels need to be reinforced with steel rails bent into the same shape as the tunnel section. However, in actual work, the shape of the tunnel changes greatly, the production batch is not large, and the construction period is short , So it is impossible to batch processing in large factories in advance. Here’s a better method of bending. This method can be adapted to local conditions at any time to change the arch shape, high efficiency, speed, production process is simple and easy. This method is based on the limit bending of the rail in the lateral distortion occurs so that the unprocessed part of the free state, while the processing part of the cold rail by additional additional bending of the rail produced