Flexible production system is processing of treatment of automation of a kind of an automation treatment facilities, content shedding and iformation flow the intelligence that handles be in harmony automatically to be an organic whole changes treatment system. After entering 80 age, flexible production system gets developing quickly. Flexible production system is divided by 3 basic ministries, if graph 1-10 place is shown, the compositive action of departmental cent summarizes as follows: 1. Treatment subsystem asks according to the craft of workpiece, treatment subsystem difference is very big. If graph 1-11 is a FMS,comprise example. Machine subsystem by numerical control lathe (unit 1) , cylindrical grinder of numerical control end panel (unit 2) , numerical control lathe (unit 3) , vertical machining center (unit 4) , horizontal machining center (unit 5) composition, 5 treatment unit deserves to have 4 industry robot, unit 2 still deserve to have central aperture cleaning machine. The rod that this system can process servo electric machinery kind, flange dish kind, support system kind, housing kind in all 14 kinds of spare partses. 2. Content sheds subsystem this system by carry all sorts of car, conveyer compose, robot, workpiece automatically to assemble and unassemble station. Workpiece memory is versed in, library of station of output of cutting tool input, knife form. The transportation that content sheds subsystem to complete cutting tool and work automatically below the control of the computer works. If the content in graph 1-11 sheds subsystem to come in and go out by 4 robots, automatic storehouse, workpiece,tray stands, station of the tray before the machine tool 5 carry car composition automatically with. 3. Iformation flow subsystem by host computer, classification the computer and its interface, peripheral equipment and the hardware of all sorts of control equipment and software composition. The main function of iformation flow subsystem is to realize the information connection between each subsystem, undertake administrative to the system, ensure regular job of the system. To a complex system, manage by different levels to just can undertake having the government of effect more to the system through the computer only, make sure departmental when the job cent keeps harmonious and consistent. To FMS, the computer science department unites kind of cent to be 3 class, the first class gives priority to the computer, call administrative computer again. Administrative computer works to command or feedback according to the spot according to attempering signal (as before barrier, alarm signal) move " exercise attempers software " , the operation that realizes all sorts of operating mode attempers plan, issue relevant control statement to leaving one class computer, the 2nd class controls the computer for the process, include computer group control (DNC) , computer of cutting tool management and workpiece management computer, its action is the statement that accepts host computer, carry out specific managing to subordinate equipment according to the instruction. The 3rd class is formed by the control computer of each equipment, realize specific program action. Deferent network constitutes the numerical control apparatus that if pursue,subsystem of the iformation flow in 1-11 controls machine tool of the computer, unit control computer, each numerical control and machine philtrum by central management computer, content shedding and information. CNC MillingCNC Machining