The Research On Comprehensive Spatial Error Modeling And Compensation Of Composite Boring And Milling CNC

In the environment of rapid development of modern science and technology, machinery manufacturing technology is constantly improved. How to achieve high precision machining has become the top priority of China’s machinery manufacturing industry today. This research participate in national "Twelfth Five Year Plan" 863 project, developed a complex object box parts for machining complex boring and milling machining center error modeling, some error analysis and error compensation. Going to establish the spatial error model of precision composite boring and milling machining center. To measure, analysis and compensate the error, and the development of error analysis system. In order to achieve higher precision composite boring and milling machining center purposes, effectively improve the quality of the end product. In this paper, a study for the content of the following four aspects:(1) The study of the structure of compound type boring and milling machining center general layout and error analysisConsider military complex body parts structure and accuracy demand, with the structure characteristics of a new type of NC machine tools, analysis the main error sources affecting the machining accuracy, such as track error, workbench error of sliding table, machine tool spindle rotation error, bending beam milling and boring ram error bending errors, etc., the introduction of the definition of comprehensive error, as the foundation of mathematical model is set up to do.(2) The establishment of a comprehensive space of the NC machine tool error modelBy modeling multi-body system, the establishment of a dedicated topology boring and milling machining centers, as well as the low-order arrays, and define the Cartesian coordinates of each typical body build feature matrix equation, eventually were established gantry milling space error Model and horizontal boring and milling spatial error model.(3) Boring and milling machining center key components of a typical error analysisAccording to the analysis and research of the key components of a typical error of three changes for a more stable error (CNC turret movement along the X-axis error, milling slide along the Y2-axis motion error, boring slide along the Y3 axis motion errors) using a laser interferometer measurements, and using nine lines for data calculation method to get specific error value of CNC machine tools.(4) Composite boring and milling machining center and develop a comprehensive error compensation error analysis interface.For Z2-axis vertical milling and horizontal boring Z3 beam axis ram error analysis, error transform know the law varies with changes in stroke, single measurement error and pre-compensation is unable to improve the processing accuracy, so the use of finite element analysis results as a function of the error between the stroke. According to their location in real-time compensation for travel, combined with spatial error model, developed composite boring and milling machining center error analysis interface.