Finite Element Analysis of Dynamic Characteristics of the Machine on Multi-Position Conditions

Abstract

High speed cutting technology has become one of the most important technology in manufacturing of automobile panel dies. The range of each motion axis of numerical control equipment is large and the entire process system exist certain differences of the dynamic characteristic cause of the large type surface size of automobile panel dies. And affect the stability of the processing conditions directly. In this paper, different locations dynamics of large CNC machining equipment was analysed, then getting the influence of processing on the dynamics of the processing position. Simulation results show the machine dynamic characteristic mainly affected by the working position of the spindle box, and the location of the workbench has smaller impact. In the low speed mode, the stiffness characteristics of the spindle box in the operating position on both sides is better and in the high-speed mode the stiffness characteristics is better in the right side of the spindle box. When the table near the right end position in X, Y have weak stiffness near 90Hz.It has weak stiffness in the left side of table near 80Hz and in middle position it has weak stiffness near 80Hz or 140Hz . In the cutting process to provide guidance for the selection of appropriate processing location and process parameters.