Development of Ultraprecision Intelligent Machine Tool

点击翻译按钮获取中文摘要

The objectives of this research have been successfully attained after two years of research. The major research results obtained are as follows ;1. Machining errors in ultraprecision cuttingThe causes of machining errors in ultraprecision cutting were classified, . and the characteristics of the main causes such a-s the rotational errors of spindles, the thermal deformation of spindles and the thermal deformation due to the cutting heat were analyzed and clarified.2. Development of machine elements required for intelligent controlMachine elements were developed which were required to compensate various errors based on the intelligent control scheme. They are micro tool positioning system, precision feed table with high stiffness by means of "Walking Drive" and ultraprecision spindle supported by magnetic bearings.3. Compensation for spindle displacement by applying timd'series analysisA new system to predict and compensate spindle errors. by applying time series analysis were developed. It was confirmed-that the machining accuracy was increased by the method and that the system performance was satisfactory.4. Learning control to compensate machining errors due to cutting heatA new system was developed to predict and compensate machining errors due to the cutting heat by Terning the relations between the temperature rise of tool and the machining-error. It was confirmed that the machining errors were compensated and high accuracy machining was realized.