Research And Development Of Composite Boring And Milling CNC System Based On UMAC

Composite boring and milling machining center is a kind of CNC machine tools with boring and milling machine function. It has some characteristics such as high processing efficiency and fully functional. Now it has been widely used in many areas of product processing. The characteristics of mechanical structure of the boring-milling machining center demand that the CNC system has the function of multi-axis and multi-channel,but there are few domestic CNC system suitable for this kind of machine. In order to solve such problems, this paper proposed and studied open CNC system based on a multi-axis motion controller UMAC, which uses a “NC embedded PC” type structure.The CNC system of the boring-milling machining center uses IPC as host computer, IPC is responsible for the machine data display, the functions of management and system program settings. UMAC works as lower computer and is responsible for program processing and logic function, and real-time monitoring the movement of the machine state. The host computer and lower computer communicate by Ethernet. According to the machine function demand, compiles machine code of the subroutine,It made that the system can recognize and execute standard G code. Designs PLC program by a programming language which is provided by UMAC. The PLC program can realize some logical movement of the machine, such as HW, back starting point. To solve the deflection of ram of boring machine, carried out the deflection compensation within the CNC system. The CNC system adopts full closed-loop “feedback + feed forward +notch filter” compound control structure, studies and regulates PID algorithm. Finally, uses C# building human-machine interface for the management of the CNC system. By debugging on the laboratory furniture, it proves that this NC system is stability and feasibility.