Cent of system of coordinate of numerical control lathe is fastened for machine tool coordinate and workpiece coordinate is fastened (process designing coordinate is) . No matter system of which kinds of coordinate stipulates as parallel as axes of lathe main shaft direction is Z axis, and the way that stipulates from chuck the center reachs tailstock center center is square to. As perpendicular as axes of lathe main shaft inside horizontal direction is X axis, and formulary cutting tool is far from main shaft to rotate central direction is square to. 1, the X that department of machine tool coordinate builds for coordinate origin with machine tool origin, rectangular coordinates is Z axis, calling machine tool coordinate is. Department of machine tool coordinate is the coordinate department with inherent machine tool, it is the foundation that make and adjusts a machine tool, also be the foundation that sets workpiece coordinate department. Department of machine tool coordinate has been adjusted before leave factory, usually, do not allow an user to change at will. Machine tool origin is the place that the machine tool secures when go up. The machine tool origin of lathe rotates for main shaft the node of the end panel after center and chuck. Reference point also is one on the machine tool secures a place, it is cutting tool declines the ultimate point that leaves changeless this bits, its position is decided by mechanical link stopper. 2. Workpiece coordinate is fastened (process designing coordinate is) department of workpiece coordinate is the coordinate department that uses when process designing, call department of process designing coordinate again so. When numerical control process designing, should decide workpiece coordinate department and workpiece origin above all. The spare parts has a design in the design fiducial. There is technology in machining a process fiducial, want at the same time as far as possible craft fiducial fiducial and as unified as the design, this datum mark calls workpiece origin normally. With axis of the X that workpiece origin builds for coordinate origin, Z rectangular coordinates is fastened, calling workpiece coordinate is. The basis that workpiece coordinate department is factitious set is to accord with a design to ask, from theoretic tell, workpiece origin is chosen in any positions it is possible, but actually, go to the lavatory for process designing and each dimension is relatively intuitionistic, answer to choose the place of workpiece origin some more reasonably as far as possible. 3. Personnel of process designing of of set of workpiece coordinate department is after the positional XOZ0 that defines point removing a knife, still should fasten set to dictate through G50 coordinate (some machine tools dictate with G92) tell a system, point of point of a knife is opposite the position at workpiece origin, namely coordinate of a workpiece is set. G50 is statement of exercise of a blame, rise only beforehand buy check action, put in front of of whole process as the first instruction commonly. Its dictate the format is Z(β) of of G50 X(α) ; The initial drop that the α in type, β is point of a knife respectively is apart from workpiece origin to be in X to with Z to dimension. After Z(β) of of X(α) of executive G(50) , systematic interior is opposite namely (α , β) has memory, show go up in monitor, this was equivalent to building a workpiece coordinate that is coordinate origin with workpiece origin in systematic interior is. In machining a process, of the treatment position that through what will identify workpiece is numerical control machine tool? To determine the athletic direction of numerical control machine tool, mobile distance, be about to build department of a coordinate on numerical control machine tool, calling mechanical coordinate department or machine tool coordinate is, mechanical coordinate department is machine tool manufacturer when leave factory, a coordinate that already installed. When work out program, with mechanical coordinate the department decides as workpiece the coordinate of athletic way and distance is fastened, established coordinate relationship with numerical control machine tool thereby. The coordinate that uses for process designing is, calling workpiece coordinate department or process designing coordinate is, knowing to make process designing personnel is in is “ cutting tool moves close workpiece ” , still be “ workpiece moves below the circumstance of ” of close cutting tool, can decide according to blueprint the machine tool machines a process, it is so in process designing, to make process designing convenient, uniform assume workpiece is secured do not move, the coordinate department that cutting tool moves will undertake process designing. The coordinate department of numerical control machine tool is to use flute of right hand right angle to get stuck coordinate is, if pursue,1 is shown. Graph 1 flute gets stuck the reference axis that coordinate fastens Z coordinate definition to be main shaft of parallel machine tool, its just are the way that runs to cutting tool clip from work station to the regulation, namely the athletic way that cutting tool is far from workpiece. X coordinate is a level, perpendicular the reference axis that places plane at workpiece outfit, when its are facing a machine tool to operate personnel to general provision on the right side of for X direction. Y coordinate is perpendicular at reference axis of X, Z, its square Xiang Zegen presses right hand law to decide according to X and Z axis. CNC MillingCNC Machining