安庆五里庙码头装卸桥大梁自重13吨,总长34米,大梁上翼板辅设小车行走轨道。大梁分前后两段(见附图),中间用四根短铰轴联接,前大梁能够变幅。轴孔的同心度要求小于1毫米。我厂没有大型膛床,若送外单位加工,运输、加工费用较高。我们采用了以下工艺加工了铰轴孔,最后检验合格。 Anqing Wuli Temple loading and unloading bridge girder own weight 13 tons, a total length of 34 meters, the beam attached to the wing plate car walking track. Beam points before and after two (see photo), the middle of four short hinge axis connection, the former beam to amplitude. Concentricity of the shaft hole requires less than 1 mm. I plant no large breech bed, if sent outside the unit processing, transportation, processing costs are higher. We use the following process of processing hinge shaft hole, the final test pass.