This paper establishes the finite element model of XK2535 gantry machining center ram structure, and considers the influence of bearing to the slippery pillow in the axial direction to analyzes the rams temperature field and thermal deformation based on ABAQUS. Finally using SINUMERIK 840D is to compensating thermal error of the ram.

In this paper, combining with PRO/E4.0 software, getting the general design idea of the hydraulic turbine, and aiming at systematic analysis and research the key technologies of development design system process of hydraulic turbine. The key technologies include the pro/toolkit interface technology, menu design MFC dialog box as well as the establishment and access of database. Based on the two modes’ characteristics of PRO/TOOLKIT application, determining to use the DLL mode of the synchronous mode for the system design model's mode; Combining with the structure of the main parts of the hydraulic turbine, aiming at the characteristics of the pro/toolkit interface technology, menu design and MFC dialog box ,concluded the development processes of the pro/toolkit interface technology, menu design and MFC dialog box; Combining with the PRO/TOOLKIT interface technology and the characteristics of technology of MFC dialog box, selected the required software which is used to create and access database, and the specific development process. This provides important technical Supports for design system of Hydraulic turbine's development.

In the case of the column materials to determined, the lower natural frequency of column is determined by the number of coupling bolts and bolt arrangement. In this paper, by three-dimensional modeling software of Solidwork column model of hobbing is set up, then by using ANSYS finite element analysis software. The initial four order natural frequency to the different number of connection bolts and the different arrangement of bolt are respectively calculated. After the initial four order natural frequency are contrasted, we conclude that in the case of merely considering dynamic stiffness this study reach it is the most reasonable to select 8-12 bolts in the hobbing of YKQ31300, and different bolt arrangement of effects on the dynamic stiffness of the column is very small and can be ignored.

Through the FEM analysis of the unloading wheel and unloading beam in unloading mechanism of the beam by using ANSYS, we obtained the deformation curve of unloading beam under the worst working conditions. The deformation compensation method can be used to manufacture the unloading beam for purpose of improving the machining accuracy. The straightness of guide of beam is up to 0.01mm/1000mm. We obtained that the maximum deformation of unloading wheel was 17.6, the maximum stress was 55.8MPa and the maximum contact stress was 37.5MPa. In order to ensure the security of unloading wheel, the consistency of theoretical result and simulation result were verified by using Hertz contact theory.

In the working process of numerically-controlled machine tool, the generation of heat by friction between the guide rail and the workbench will cause the thermal deformation under the high temperature, which impacts on the machining accuracy of machine tool. Through the finite element modeling for the guide rail of machine tool by the ANSYS software, the thermal characteristics is simulated in the process of guide rail, then the main factors of thermal deformation is analyzed, finally the corresponding measures focusing on the error compensation is proposed.