车轴表面车削和磨削加工技术会在车轴表面产生残余拉应力,降低了车轴抗疲劳性和耐蚀性,为改善磨削加工后的表面应力状态,采用滚压强化技术对车轴表面进行强化处理,以满足EA4 T轨道车辆用车轴表面耐磨性、耐蚀性和配合性的使用要求.结合车轴在加工过程中的应力状态,提出了EA4 T轨道车辆用车轴滚压强化技术方案,并针对系统参数的要求,通过设计计算分析,完成了传动部件的选型和一体式铸铁床身、高刚度主轴系统、X向伺服液压驱动、液压尾顶系统、滚压装置等关键部件的结构设计,最后通过滚压实验,确定最佳车轴表面粗糙度为Ra 0.183μm,表面硬度可以达到251 HB,满足车轴的尺寸精度和表面质量要求,完成了对所设计滚压强化设备性能的验证.

车轴是轨道车辆行走部分的核心元件,是轨道车辆承载重量和安全运行的关键零件.在轨道车辆运行过程中,车轴承受运行颠簸中的交变载荷作用,长时间在大载荷、滑动摩擦条件下工作,车轴表面极易产生疲劳裂纹,导致车轴疲劳失效,提高车轴的表面性能、耐磨性、抗疲劳性能至关重要.针对轨道车辆车轴高表面性能、高抗疲劳强度的要求,开展车轴表面滚压加工工艺技术研究,进行了车轴滚压加工工艺试验,通过分析主轴转速、进给速度、滚压力和吃刀量对滚压车轴表面粗糙度和表面硬度的影响,得到了最优滚压工艺参数,经滚压后的车轴表面由拉应力变为压应力,表面粗糙度和表面硬度都得到显著提升,极大延长了车轴的使用寿命,满足了轨道车辆车轴的使用要求.

为了适应高速铁路车轴数控滚压工艺需求,实现滚压力精准控制,我们设计了一种主要由液压伺服放大器、840Dsl、ADI4、ET200M和S120伺服驱动等组件构成的数控液压伺服系统.系统硬件模块使用通信协议交换数据;液压伺服系统使用光栅尺实现位置闭环控制;使用力传感器实现滚压力反馈监测.液压伺服系统作为执行机构避免了强化滚压过程中传动机构损伤,满足了车轴外圆及轴身滚压工艺需求.

为满足复合材料纤维缠绕的要求,对纤维缠绕机的纤维导向装置进行结构设计及受力分析.通过对纵横向运动机构、旋转装置机构和分线机构的设计,利用solidworks进行3维建模,将设计出的纤维导向装置各零件进行装配,调节各零部件尺寸,实现缠绕功能,利用simulation对装置中受力较大零件的3维模型进行受力分析,并通过缠绕设备进行气瓶缠绕验证.实验结果表明,各部件均能满足设备使用要求.

为解决纤维复合材料气瓶缠绕的问题,在卧式缠绕机上对气瓶纵向缠绕进行试验.根据纤维导向装置结构设计,对缠绕运动方式的特点进行分析,建立纵向缠绕数学模型,计算出纤维缠绕角,通过NC程序编程,实现了卧式纤维缠绕设备在纵向缠绕时的自动化运动.试验结果表明:芯模上的纤维紧密排列不松散,符合CNG气瓶缠绕的精度要求,满足纤维复合材料气瓶缠绕的使用要求,验证了利用卧式纤维缠绕机进行纵向缠绕的可行性.

Introduce a method to the cylinder for multipoint orientation economy and accuracy.It uses PLC controller, the relay output interface is dopted to drive electromagnetic value to control cylinder,and the displcement transducer exam-ines the motion continually.The data is feed back to the PLC,then the PLC program computes the motion automatically ac-cording to the setting parameter,thus achieves the cylinder for multipoint orientation.Through the application,this method has the good economy,high reliability,and the strong practicability in the automation control design.

In order to improve the centering and docking success rate of the certain type projectile cabin,while the V type horizontal positioning can not meet the technical requirements of the existing research and development,propose a new method of cabin vertical docking.The method using the holding ring and the lower ring clamp at the forecabin and the back cabin,which is in the vertical state.The forecabin can move along the radial direction and tilt vertical angle relatively,so as to realize the flexibility in docking of the forecabin and the backcabin.By contrast,the cabin vertical docking method has the higher success rate,and is more efficient to adapt to the development of the new model.

The article proposed two kinds of method that transform the image into the numerical control processing code.One kind of method is that transform the image which obtains from the interferometer into the NC procedure;Another kind of method is that production transition document through OPN software,then produces the NC procedure again.Carries on the comparison after the transfer efficiency and the processing precision aspect,has determined the reasonable processing method.