Characteristics Study On Bridge Type Gantry Five-axis Machining Center Beam Parts

Recently high-speed machining developed machine is of one the hotspot, the emergence of high-speed machining higher provides requirements for gantry large machine tool design. Traditionary gantry tool machine commonly used old structure design that have traverse tationary and workbench sbeam,and it is difficult for tradition machine tool to process with hign speed because beam parts have large quality. Gantry machining adopt center traverse beam parts and stationary workbench,overcome the insufficient that tradition gantry machine i not s fit for development of modern high-speed machining. Gantry machining center have powerful vitality,but Put forward higher to claims beam Parts structure design.Combined with TH58200X600(GMC2060U) Bridge five-axis machining center, enhancing the structural rigidity of machine tool beam parts and reducing the quality of the beam components for the purpose of meeting the high-speed machining machine tool and a good dynamic and static characteristics, do study related components of Bridge machining center.The paper firstly describes the main structural characteristics of TH58200X600(GMC2060U) machining centers, and gives the main technical parameters of the machine. According to structural characteristics of TH58200X600(GMC2060U) processing center beam parts, create a solid model of machining center in the 3DSo1idworks software. Because the machine is relatively complex mechanism, and the paper's study refers to the beam components, the machine structure has been simplified when the finite element model established. And the important combined surfaces for beam components are defined. To simplify the structure first, and then conduct the combined surface defined in the ANSYS; finally Meshing the machining center beam parts into second-order solid tetrahedral elements for acquireing finite element mesh model.Using component analysis method in Modal analysis theory, get the combination of surface characteristics of machine parameters by means of testing. The characteristic parameters is applied for the finite element modeling of the whole structure to convert more precise structure FEM model of the original machine. And then analyze the finite element model respectively from static, modal harmony and harmonic frequency response, to be dynamic and static characteristics of the original structure.In the design process of beams driving and control regulation, through the finite element model analysis method, explore the different conditions for location-driven layout impacting to the main components dynamic characteristics; based on the analysis results, to find the optimized driver layout form, and choise the acceleration; at last using parallel axis control technology to achieve the best results for parallel drive of beam.Thesis not only for large gantry-type machine with surface contact processing technology provides a new method, but conclusions can be used to guide the actual machine tool design, to improve the technical level of related products designed to play an active role.