??? With the community s diversity of products, Lower manufacturing costs and shorter manufacturing cycle, the increasingly urgent demand, flexible manufacturing systems (FMS, Flex2ible Manufact uring System) development is quite rapid. After 80 years of the 20th century, manufacturing automation into the computer-based integrated manufacturing (CIMS) of the times, FMS has become the focus of the development of manufacturing automation. FMS marks the traditional mechanical manufacturing industry has entered a new era of development change, since its inception to show great vitality. So far, the world has a lot of FMS in operation, only Japan had 175"> Century, the main mode of production machinery manufacturing. FMS is a processing system, Material system and the computer control system composed of And can produce varieties according to the manufacturing tasks and to adjust rapidly to changes in automated manufacturing systems. Among them, the material system to achieve automatic workpiece and fixture supply and handling, as well as the completion of the automatic transmission between processes, Transported, Sorting and storage, including a variety of conveyors, Automatic Guided Vehicles, Industrial robots and special lifting transport machines. Extracted from the assembly line conveyor belt sorting system to send over the parts on to detect the type of workpiece, and classification, and finally pushed into the chute where the corresponding artifacts. This PLC-based control design of automatic sorting system, according to work The color and material online detection, rapid classification, improve sorting efficiency. First, the composition and function of the system The design of the workpiece is divided into three kinds, the first one kind of red plastic parts, the first two kinds of black plastic parts, the first three kinds of metal parts for the silver. Pneumatic components extracted mainly by the extraction of parts of the pneumatic manipulator Linear drive unit, Photoelectric sensors and electromagnetic proximity sensors and other components. When the piece came from the assembly line conveyor belt transmission, the photoelectric sensor detects the workpiece after y: Times New Roman ; mso-hansi-font-family: Times New Roman "twffan =" done "> mechanical hand to grasp the realization of extracting motion, linear drive unit to drive the robot to linear motion, to achieve delivery of action Detection units will be delivered to the workpiece. detection and sorting by the sorting action execution component main components, Belt, Category stacking chute and a variety of workpiece detection sensors and other components. When pneumatic components extracted to detect transfer of the workpiece conveyor components when the optical sensor detects the workpiece, then start the conveyor belt and an implementation of the block attached to the boom in the detection of the workpiece position, the location to install the two sensors, that is, inductive sensors and diffuse reflection sensors, inductive sensors which detect whether a piece of metal, diffuse reflectance sensor detects the workpiece is black, ont-family: Arial; mso-ascii-font-family: Times New Roman ; mso-hansi-font-family: Times New Roman "twffan =" done "> test piece to determine what kind of finished workpiece , the corresponding implementation of the components attached to the boom rotation drive gear in the appropriate classification of the workpiece position and realize the classification of piling up, the final allocation of board reset, send some to stop movement, complete sorting. Second, the control system hardware design Sorting system control block diagram shown in Figure 2 shows, the hardware consists of S72300-type PLC computer controller The sensor and motor interface circuit and other components. (1 an ; mso-hansi-font-family: Times New Roman "twffan =" done ">) PLC control system requirements for the work PLC control systems required to control the extraction of the workpiece, Detection and sorting and other activities. The process is in place for the assembly line conveyor belt on the workpiece → Pneumatic components extracted → Detection of pneumatic robot position → Detection of pneumatic manipulator state → Fall crawl workpiece manipulator → Robot move along the linear drive unit → Detection of artifacts sent to the sorting conveyor → Decreased release manipulator → -Family: Arial; mso-ascii-font-family: Times New Roman ; mso-hansi-font-family: Times New Roman "twffan =" done "> mechanical hand up → Robot returns → Start sorting conveyor → Detection of workpiece types → Detection of the corresponding state of implementation attached to the boom → The corresponding implementation of the barrier boom and the extended → The corresponding implementation of the barrier boom retracted → Sorting test piece in place. (2) Core components Simatic S72300 is a modular structure, mainly by the rack, CPU n "twffan =" done "> modules Signal modules, Function modules Interface module, Communication module, Power supply module and programming of facilities, various modules installed in the rack, the system and the extensions are very convenient. According to the requirements of the system, control modules used: CPU2313C 2DP, I / O modules used: CP 34222. (3) sensor selection Sensor is a kind of test a variable and the results sent out the functions of the device, in this system is mainly used to detect the workpiece in place, Workpiece type and stroke control. one "> Third, control system software design As the automatic sorting system, the work of the process is the order of action, so control procedures by step instructions along control programming. Control procedures including the initialization procedure Reset process and automatically run the program. Automatic operation mode when the system must start in situ, that is, sorting parts and components were extracted in situ Office. After the system start to run continuously repeated until the press “ stop ” Button or alarm, the system shut down after running to the in situ. IV Conclusion Flexible production line automatic sorting system is used in parallel control and modular design, both mechanical devices = "Times New Roman">, or control system design, has good scalability, A high degree of flexibility and flexibility. Apply not only to a few varieties of sorting items can also be extended to a variety of goods sorting; not only apply to the finished product sorting, but also to the dispersion of transmission parts. The system has been successfully applied to mechanical and electrical engineering laboratory flexible production line. The results indicated that stable and effective, fully applicable to the FMS flexible production line of the workpiece automatic sorting to enable flexible production line efficiency greatly improved, with the popularization and application.