1、 变速箱箱体卧式双面铣削组合机床控制系统设计 摘要 本课题是根据已给出的参数，设计出某 组合机床 的液压系统，具体包括液压传动系统设计和电气控制系统设计。 对于液压传动系统设计，要使系统完成“ 夹紧缸夹紧 工作台快速接近工件 工作台进给 工作台后退 夹紧缸松开 原位停止 ”的工作循环。 根据此要求，设计出液压回路，再根据参数，选择符合要求的液压元件，例如液压泵、液压阀、滤油器、行程开关等；对于非标准件液压缸，则要确定所有尺寸，选择合理结构形式，用 AUTOCAD 软件绘制出装配图；系统设计完成后，要对系统进行性能验算，例如回路压力损失验算、油液温升验算等，以确定系统是否符合实际要求。 对于电气
2、控制系统设计，现在，由于 PLC 可靠性高、编程简单、使用方便、体积小、重量轻等优点，普遍采用 PLC 控制来代 替继电器接触器控制，本系统也采用 PLC 控制。根据系统的输入输出性质、对相应功能、 I/O 点数、系统容量的要求，选择合适型号的 PLC，PLC 选定后，分配 I/O 点并绘制 PLC 外部接线图，确定输入输出信号与 I/O 点的对应关系，最后设计出程序，并修改，直至符合要求。 关键词 ： 液压传动； 液压控制 ； PLC GEAR-BOX HORIZONTAL DOUBLE-SIDED MILLING COMBINATION MACHINE TOOLS CONTRONL SYS
3、TEM DESIGN Abstract This topic is already given parameters according to, the design gives a combination machine tools system, specific including hydraulic transmission system design and electrical control system design. For the hydraulic transmission system design， to make the system to accomplish t
4、he job cycle of combination machine tools system -clamping cylinder for clamping workbench fast approaching workpieceworkbench feedingworkbench back clamping cylinder loosen In-situ stop. According to this requirement, design a hydraulic circuit, then, according to parameters, select to meet the req
5、uirements of hydraulic components, such as hydraulic pumps, hydraulic valves, filters, Travel switch, etc. For non-standard hydraulic cylinders, will have to 华北电力大学本科毕业设计（论文） I 2 determine all sizes, choose the right structure, then, mapping the assembly drawing by AUTOCAD. After accomplished design
6、, there are some checking of system performance, such as the checking of the circuit pressure loss and the oil temperature rise, to determine whether the system meet the actual requirements. To electrical control system, nowadays, to PLC, because of its high reliability, convenient use, simple progr
7、amming, small size, light weight, etc., it is widely used to instead of relay and contactor. So, this electrical control system uses PLC, too. According to the nature of the system input and output, the demand of corresponding functions, I/O points and system capacity, choose the suitable type of PLC, after that, distribute I/O points and external wiring diagram of PLC to determine the input and output signals and I/O points of correspondence, finally, design the program, and modify, until it meets the requirements. Keywords:Hydraulic transmission；Hydraulic control； PLC
