Research On Turning Of Fast Tool Servo Based On Piezoelectric Ceramic

With the development of science and technology, the micro-structures with complex surface are more and more widely used in military、MOEMSFTS、high tech equipment、 fiber-optical communicating and other fields. Such micro-structure has a complex surface and a high machining accuracy requirement.The traditional machining method is difficult to meet the machining requirements. The Fast Tool Servo(FTS) turning is suitable for machining micro-structures with complex surface efficiently and high qualitatively, owing to its high frequency response and high accuracy, and could achieve a high accuracy micro-structure with a simple machining. The FTS technology has been developed very well and some research has been commercialized.In our country,the research about the FTS started relatively late and it mainly concentrated in the university at present.Due to the lack of core technology, there is a significant gap with foreign countries.This paper aims to research the FTS technology based on piezoelectric ceramic (PZT)。The main contents are listed as follows:1、Acquire the angle information of spindle by using the MCU to count the encode signal,then transmit the acquired information to the PC through a serial port. The control software drives the PZT as soon as it gets the signal coming from the serial pot.This solution completed the synchronization control between the PZT and the spindle.At the same time, it proved the machining capability of this FTS device driven by the PZT.2、Planning the tool path of the FTS turning and having a study on how to obtain the surface-shape data.This paper took four-ball crown lens array as research subjects, illustrated the coordinate calculation method. Based on the study above, simulation analysis was conducted and the main machining parameter affecting as to the machining results was discussed and the NC code was produced.3、Conducting a machining experimental platform which was used for FTS,based on the Five-axis Machine Tool.The A3200 controller of the Five-axis Machine Tool control the motion of X axis and the spindle and send analog to the PZT which compete the feed at the Z direction at the same time.The spindle、X axis and PZT completed a synchronization control by this way.The method and machining experimental platform which was conducted for FTS was tested by machining the typical micro-structures which contained four-ball crown lens array an sine wave surface.