Study And Application Of The Testing Platfom About The Accuracy Preservation Of The Ball Screw

CNC Machine tools is the essential equipment in manufacturing industry,the performance of the machine tool determines the level of the equipment manufacturing industry. The ball screws and Linear guides, which is one of the most critical components for CNC machine tools, is the key to affect the accuracy stability of the CNC machine tool.Subject comes from the national science and technology major projects named "CNC machine tool performance and accuracy stability research". Firstly, article summarizes the gap between domestic CNC machine tools and the international advanced CNC machine tools in accuracy stability. Secondly, following the accelerated degradation test method developed the test bed for accuracy stability acceleration test of machine tool linear feed unit. Determining the scheme of the test bed according to the requirement of the test, conducting the mechanical system design and control system design.Ball screw accelerated degradation test-bed designed signal acquisition system, mainly gathers information characterizing the performance of the ball screw. Ball screw accelerated degradation test-bed designed of signal acquisition system, mainly gathers information characterizing the performance of the ball screw. The ball screw signal are acquired, for example:straightness errors, positioning accuracy error, travel deviation values, the temperature of the ball screw, the motor output torque, friction torque of ball screw vibration signals and so on during operating status.Signal acquisition performance ball screw feature information are analyzed for the use of Matlab software programming in the previous chapter. Analysis of ball screw in the degradation process deviations and changes in itinerary friction torque, according to the changes in these information of ball screw, in accordance with ball screw summed degradation, provide for the theory of ball screw design and processing.