Research Of On-line Dynamic Measurement And Error Compensation Technology Of Ball Screw

Due to the characteristics of high transmission efficiency, higher precision and long life, the ball screw are widely used in machine tools, aerospace and nuclear industry fields, so its quality has been concerned. In recent years, with the increase of China's overall strength, the production of CNC equipments with large traveling range and high precision are required. The ball screw is one of the important components in CNC equipments as transmission components. The ability to produce ball screw with large traveling range and high precision is the reaction of national mechanical equipment industry level, so the research of ball screw machining and testing technology which can improve the ball screw machining efficiency and precision has great and far-reaching significance.The ball screw machining process involves turning (milling), grinding, and the screw measurement. The application background based on large traveling range outer screw milling grinding center, put the traditional spiral milling, grinding and measurement process in one body, to make the screw machining efficiency improved. The detection and compensation process of screw improved the screw accuracy. This article mainly aims at the ball screw on-line dynamic measurement and error compensation technology.The conventional measurement methods of screw were compared. The measurement method and principle suits this topic was proposed and the system structure was constructed based on the outer screw milling grinding center.The causes of the screw error were analyzed and were expounded in aspects of screw machining process and screw measurement process. Then the ball screw precision judgment was researched and the methods and formulas about calculation of each trip variations in screw pitch error were got according to GB.The error compensation principle of screw was narrated. Then the fuzzy self-adaptive PID algorithm in this paper was put forward. The realization of programmed fuzzy adaptive PID algorithm in the fields of fuzzy input, fuzzy algorithm, fuzzification solution and PID control output was researched and the application example simulation was carried out.Study design screw test and control system software. On the premise of determining dynamic measurement method, precision analysis and error compensation algorithm, the test control system software based on Visual C+ + and Access realization of 2003 was designed, which with functions of dynamic measurement, precision analysis, measurement error compensation simulation and output control.