Abstract:Based on highsilicon aluminum alloy nocylinderliner engine block bore materials grinding characteristics, a dualspindle CNC honing machine tool was developed. In the machine tool, twoposition twospindle honing layout was used, it consisted of the following modules: spindle box, column, column glide, workpiece clamping table and so on. Spindle honing dual feed mechanism and honing oilstone double feed body were adopted. A closed loop control system based on motion control card was used. The system hardware platform was IPC and general industrial motion control card, based on the pneumatic differential pressure measuring honing online system, processing volume closedloop control was achieved. The software platform was Windows system, VC++ development tool was used to program specialized processing procedures for the honing process.