Design Of The Vertical Servo Control System Based On The Q Series Plc For Rail Fine Grinding Machine

With train’speed of our country becoming faster and faster, rail flatness requirements are also increasing. The quality of rail directly affects the safe operation of trains and passengers ride comfort. At present, China’s rail welding commonly used flash welding, but a welding tumor will always leave in the welding seam after welding.In order to meet the requirements of rail flatness,we must remove the welding tumor.But the present grinding device is difficult to meet the requirements of batch processing.So we urgently need to develop a efficient and Stable performance rail grinding machine for batch processing.In this paper,the rail fine grinding mechine uses profiling fitting grinding principle to grind rail’top and side within one meter. The entire grinding process can be divided into two aspects which includes the vertical feeding and swinging around,and this paper is mainly for the designing of vertical feeding.This paper includes the following sections:the overall mechanical design of the rail fine grinding machine,the actuator designing of the vertical lifting mechanism,and the hardware and software design of vertical servo system. The overall design of the machine including the identification of the processing principle, overall layout and sports assignments.The design of vertical servo actuator includes the determination of the vertical lifting mechanism, the calculation of the transmission parts selection and testing of component design and selection, the calculation and selection of the transmission parts and the design and selection of the detection elements. The control system uses a semi-closed loop control and includes Q02H high-performance PLC, MR-J3-350A servo amplifier and QD75M4positioning module in order to fulfill the control of vertical lifting mechanism. In this paper,the hardware and software design of vertical servo system is the focus and difficulty.The hardware design is mainly selection and analysis which is the various components of the vertical control system,and the software design is mainly writing PLC subroutine of the vertical control system.