Papers by Author: Xiao Kai Shen

Abstract: In this paper we establish a model of DVG850 machining center, and analysis the influence of bolts layout in the model on static stiffness. We got one hundred groups of stiffness data about different sizes of bolts through Workbench. Then the paper creates a 3D-graghs of different bolts, flanges and displacements, it also created a profile between flange-thickness and column-displacement. Though the dates and graphs it can find that stiffness of the hole machine will be influenced by the size of bolts and flanges directly ,also some better groups will shown in profile. Besides, relevant function is simulated by numerical methods. The conclusion provides a basis for the choice of better structure and can guide the analysis connection stiffness.

Abstract: The main work is calculating and analyzing the worktable’s static stiffness in different positions, and drawing 3D static stiffness spectrum of the worktable in Z direction according to the analyzing results. DVG850 High-speed machining centre is taken as the research object, to establish the solid modal in ANSYS Workbench and analyze the worktable’s static stiffness in different positions. and the paper uses its worktable as the researching object. According to the results the spectrum of the static stiffness of the worktable is drawing in Matlab. The spectrum shows that the more the position is near the edge, the larger the static stiffness is, and it changes faster, however the middle is smaller. This spectrum has certain directive significance for the optimal design and improvement of product quality of design.

Abstract: The headstock is one of the most important parts of a machining center, however there are a lot of designing variables that may influence the static and dynamic capability of the headstock. How to find these variables and optimize them seems to be very important. In this paper, using the modal frequency as the performance index, Pro/Mechanical was used to analyse the sensitivity of the DVG850 high-speed vertical machining center headstock. The result of the analysis was a set of main design-variables that influence the first-order natural frequency of the headstock. The machine’s typical operating conditions were compared against the results of the sensitivity analysis. This provided a basis for structural design and optimization of the headstock directly and quickly.