Research On Virtual Machining Center And Kinematics Of Four-axis Linkage Cutting

The most special feature of virtual processing is rebuilding and simulation of machining on computers. It's significant for manufactural companies to save costs and increase competition. Modeling method and solution of three-axis virtual machining center are exploited in the dissertation. Based on that, kinematics of four-axis linkage cutting is also developed. The following content have been completed, including:1. Building of virtual machining center. Based on construction of real machining center, geometric model and motion model of virtual machining center are built by using hierarchical modeling function.2. Building of tool database and implementation of ATC. Tool database is exploited by using relational data base schema which included many functions such as accession, deletion, compilation and searching. Also, ATC is completed in the system.3. Based on triangulation method of workpiece, a real-time modeling of NC milling process is developed. Local hunting algorithm is presented to find out the set of points that are cut and revise Z-value of these points. Calculation of the normal vector of triangular plate is optimized during the re-drawing. A kind of displaying updating method is carried out to accelerate the speed of re-drawing. The example manifest, the proposed method raises the performance of NC milling simulation both in speed and displaying.4. Kinematics of 4-axis linkage processing of ruled paraboloid surface is analyzed. Through 4-axis linkage side-milling, an innovative speedy, low cost processing method is tryed for manufacturing ruled paraboloid surface.The 4-axis linkage interpolated mathematic model of ruled paraboloid surface is built by adding a rotation axis A on the presented 3-axis machining center. The interpolated mathematic model is simulated in MatLab, with the virtual product made in soliding software.