| 摘要 |
PROBLEM TO BE SOLVED: To provide a numerical control device for five-axis processing machines, which avoids movement in which the speed and acceleration of axis of rotation at a singular point are very large when determining that the singular point is passed through in tool posture control. SOLUTION: The numerical control device for five-axis processing machines for performing tool posture control of a five-axis processing machine having linear three-axis, an axis of rotation for tool inclination and an axis of rotary two-axis of a rotary axis for tool rotation to machine a workpiece fixed to a table is provided with: a singular point passing determining part 36 for determining whether the rotary axis for tool rotation passes through an arbitrary singular point or whether the rotary axis for tool rotation passes through the vicinity of the singular point by calculation based on a command at a command block start point and a command at a command block end point, a singular point operation avoidance preparing part 37 for changing a command tool path of the command block at the singular point and the vicinity of the singular point when it is determined that it passes through the singular point or the vicinity of the singular point, and a singular point operation avoiding part 38 for executing the changed tool path. COPYRIGHT: (C)2010,JPO&INPIT |
