动车组轮装制动盘螺栓安装工艺及其影响研究

Study on Bolts Assembly Process of Wheel-mounted Disc of EMU

动车组轮装制动盘螺栓的安装目标是保证安装后螺栓内部存在规定的预紧载荷。传统的安装方法是人工扭矩安装法,即通过人工施加一定的扭矩来间接保证规定预紧载荷的实现,缺点是准确性和一致性由于受影响因素较多,所以很难保证。针对轮装制动盘螺栓的安装提出了机器扭矩转角法代替目前的人工扭矩法。为证明新安装工艺的可行性,通过试验研究和有限元仿真,针对轮装制动盘螺栓的载荷情况、安装效果和运用状态等进行了两种工艺的研究。结果表明:相对人工扭矩法而言,机器扭矩转角法既能极大改进安装的准确性和一致性、提高生产效率,又能保证产品运用状态的稳定、减少潜在故障的发生,可推广并代替传统的人工扭矩法。

The goal of bolts assembly for Wheel-mounted brake disc is to ensure that there is specified preload inside the bolts after assembly.The traditional assembly method is manual torque method,specific preload is implemented indirectly by applying a certain torque manually.The disadvantage of this method is that it is difficult to guarantee accuracy and consistency of assembly bolts preload because the preload is influenced by many factors.In this paper,the mechanical torque angle method is proposed.In order to prove the feasibility of the new assembly process,two kinds of process are studied through Thermo-Mechanical analysis,experiment and measurement,as well as finite element simulation,in view of the loading condition of Wheel-Mounted brake disc bolt,the effect,assembly efficiency and its application state.The research demonstrates that,compared with the manual torque method,the mechanical torque angle method can not only improve the accuracy and consistency of the bolt assembly greatly,increase the production efficiency,but also ensure the stability of the product application state and reduce the occurrence of potential failure.Thus,it can be promoted to replace the traditional manual torque method assembly process.