Study On Dynamics Modeling Of Machine Tool And Its Application In Finite Element Analysis Of Surface Grinding Machine MGK7350

With the modern machine tool tends to high-speed, high precision, large power and automation, the requirement of dynamic performance is also higher and higher.The dynamic model of machine tool structure is the basic of its dynamic analysis and dynamic optimization. The key to establish a precise dynamic model with Finite Element Method is the simulation of the dynamic characteristics of the joint face in the machine tool. The research work is outspread according to the CNC High Precision Surface Grinder with Horizontal Spindle and Rotary Table MGK7350 witch produced by Hangzhou Machine Tool Group Corporation.In this paper, firstly studies on the characteristics or the machine tool joints, emphatically analyz the dynamic model correction method based on joint parameters-parameter optimization. Propose a technology mean witch can avoid inconvenience brought by simulating these components free sate transforming boundary condition in using this method. Points out the importance of the modal-shape correspond in the process of optimization. Secondly, utilizes this optimization to identify the stiffness and damping parameters of joint faces in CNC High Precision Surface Grinder with Horizontal Spindle and Rotary Table MGK7350, and establishes a whole machine finite element model in witch the joint face characteristics have been considered. Analyzes and discusses the usage of 3-D solid element and the method of finite element mesh generation. Finally, do the whole machine modal analysis with method and finite element method, contrasts the experimental and theoretical results, proves this finite element model can stimulate the dynamic performance of the whole machine effectively; it is of practical value of engineering application.