Experimental Study On The Characteristics Of A Two-Axis Drive NC Workbench

With the development of science and technology, machine tools tend to high-speed, high efficiency, precision and automation; the processing performance requirement is increasingly highly. In order to make machine tools to high-speed high efficiency, high-quality capability, the structure must have a good dynamic characteristic. Also, the dynamic characteristics of machine structure influence their work performance, efficiency, stability and reliability highly, It now has become the very important evaluation target of the performance of machine tool. Therefore, improving the dynamic performance of machine tool structure,the machine tool industry has become a subject of study of modernization.CNC machine reliability pursuit of the ultimate goal is to ensure machinery parts processing precision. And the machining accuracy of guarantee from the original is in need of mechanical design and machining process ontology of servo control precision to guarantee. Therefore, how to improve the control precision feeding system is the guarantee of mechanical parts processing precision is one of the important factors. Influence control accuracy servo system reason is cutting process system friction and cutting forces changes, tracking error caused by servo system, affect the final parts processing precision. Based on the special major national technology for CNC machine reliability research high-grade subject matter, by Simens840D in the numerical control system HMC500high-speed horizontal processing center for research object, use840D user second redevelopment function, in the NC machining process online access the parameters of the CNC system, constitutes NC machine tools "green test system", so as to achieve the required experimental data. HMC500high-speed horizontal X axis machining center for double servo motor double ball screw driver, two screw in the process of operation a bear is the tension, another withstand the pressure; Aiming at the characteristics of X axis studied the main research:(1) Tectonic two-axial drive the dynamic model of nc workbench; (2) Numerical calculation of experimental data, find out at the same speed motor current and workbench position eight times, make the theory of polynomials relationship curves and practical curve and calculates the theoretical curves and errors between actual curve;(3) Analysis of the experiment, according to experimental data calculation of two motor and motor, the relationship between the total current and workbench position is given, the relationship between the calculated8times polynomial coefficient and the relationship between the workbench speed;...