Dynamic And Static Analysis And Optimal Design Of A New CNC Machine Tool’s Rotary Table

CNC machine tools are regarded as the representative of the advanced industry,and are widely used in aeronautics and astronautics, military industry as well as invarious fields of national economy. In the occasion of machining precious metals, CNCmachine tools must satisfy special requirements. Not only should they achieve highmachining precision, but also they should have compact volume, and takes debrisrecovery into account to avoid waste and environmental pollution. The traditionalmachines are mostly heavy and have large size. Therefore, it is necessary to developspecialized CNC machine tools for precious metal processing. As a key component of aCNC machine, CNC rotary table has a direct impact on the overall performance andproduction efficiency. Therefore, the study of the dynamic structure of CNC turretdesign process for the machining accuracy and machining quality plays a vital role.Therefore, it is of great importance to study the dynamic design of CNC turret, whichplays a important role in enhancing machining precision and processing quality.In this paper, CNC rotary table of precious metal processing machine tool is treatedas research object, and dynamic design of CNC turret was completely study. Five partsare included as following: parametric modeling of CNC turret, static and dynamiccharacteristic analysis, response surface model of static and dynamic characteristics,multi-objective optimization based on genetic algorithm, machining simulation. Firstly,according to static and dynamic characteristics of the NC rotary table, the key structuraldimensions are determined, and parametric model are established using of Pro/E.Secondly, through the seamless interface of ANSYS Workbench and Pro/E,3D modelis introduced into ANSYS. After setting the material of parts as well as the form ofcontact between parts, the finite element model of CNC rotary table is built. Then, giventhe appropriate boundary conditions, the static and dynamic characteristic analysis areprocessing. Thirdly, the response surface model of dynamic and static characteristics iscreated by DOE method. Fourthly, based on the genetic algorithm, multi-objectiveoptimization of the NC rotary table is implemented to design NC rotary tabledynamically. Finally, the machining simulation is carried out, by using VERICUT.This paper accomplishes the optimization of critical dimensions of CNC turretthrough dynamic design. Dynamic and static characteristics are improved, withoutincreasing weight. Machining simulation of a typical part by VERICUT can trulysimulate the3D machining process, detect the over-cutting and interference problems,and verify the correctness of the machine running. This paper fulfills the dynamicdesign process of NC rotary, which has important significance to guide practical design.