Abstract
The purpose of this thesis is to upgrade Built-in high-speed spindle speed, while enhances the rotational speed, how to avoid the rotational speed promotion, creates the big vibration oscillation amplitude is the question which must first probably consider; And the further change main axle system's dynamic characteristic, causes the vibration quantity, in requests in the scope is the goal which this article needs to pursue. In order to achieve the above goal, this article starts from the research on the existing feasible rotational speed main axle's dynamic characteristic, Forecast works as the rotational speed promotion vibration situation, thus changes originally the systematic design, avoids the large vibration quantity. There are many kinds of reasons for the vibration, to solve the different vibration problem, need to use the different method. Must therefore to gauge the vibration signal makes the diagnosis, discovers the vibration source. And the most major problem from overlap creates in the excitation source frequency and the nature frequency resonance effect. And according to the waterfall diagram, in these exciting forces, the response to the balanced exciting force is much bigger than other response, therefore this must discuss for this article. First by way of the modal analysis, may obtain the main axle system's nature frequency. Compare the modal parameter from the modal analysis to the result of the simulation, the resonable mathematic mode can be moded. by obtains the reasonable model, this model can be used to calculate that the time the system rotation. as well as time change design variable change. This research has established a complete research of the promotion for spindle speed and has provided system various parameters and the main axle dynamic characteristic relations from the simulation, obtains the effective improvement method