Modeling of spindle speed and feed rate considering the kinematic behavior of CNC lathe in face turning
摘要
Investigating the machine kinematic behavior is regarded as a challenging task in both the CNC turning manufacturing process at a constant cutting speed control and face turning operation. The feed rate modeling in relation to spindle rotation variation has become highly needed. This process requires two basic steps: (i) identifying the spindle reaction and (ii) modeling the axis motion behavior at any point of the machined surface. From this perspective, this paper introduces the modeling of the axes kinematic behavior of a CNC lathe while considering the kinematic performance of each axis and spindle (jerk, acceleration, and speed). This model consists of calculating the spindle rotation speed (SRS) for different successive positions of the tool nose along the X axis. The developed model equally allows the estimation of the actual cutting speed as well as the cutting time in face turning. It has been confirmed that the cutting speed evolution occurs in three stages: (1) variable SRS with constant cutting speed, (2) variable SRS with variable cutting speed, and (3) constant SRS with variable cutting speed. Finally, an experimental study was undertaken to validate the developed models.