Study On The Dynamic Characteristics Of The Welding Lathe Bed And Casting Lathe Bed

The development of the science and technology enhances the improvement of the manufacture level of the steelwork and machine equipment. Nowadays, the welding technique has already been applied to manufacturing lathe bed of the machine tool. Especially, along with the comprehensive application of the computer control technology in industry, various Numerical Control (NC) machine tools have been made. The lathe bed made by the welding technique holds many advantages. For instance, the design of this kind of lathe bed is more flexible, whereas the producing period is shorter. In addition, the unit processing according to the requirements of the clients is also available. So far, the welding technique has been adopted by more and more machine tool manufactories. All these will further accelerate the application and development of this approach.In this dissertation, we attempted to analyses the dynamic characteristics of a set of CC40 type welding lathe bed and casting lathe bed by Experimental Modal Analysis. This dissertation was divided into six chapters. In chapter I, the research object and objective were determined. In chapter II, the experimental design was selected.. The theory of the Experimental Modal Analysis was expatiated in chapter III and in chapter IV, the principle and approach of the data processing were discussed. The analysis method and process were introduced in chapter V. Finally, based on the results of modal frequency, modal shape and modal damping, the dynamic characteristics of lathe bed structure was evaluated and more evidence that the welding technique to substitute the casting technique were also discovered.