Structural Analysis And Improvement Of The Main Parts In High-precision Cylindrical Grinder

As a core part of the manufacturing, equipment manufacturing is the basis of national industrial development. With the development of modern product design, the manufacturing equipment is also put forward higher requirements. As an important method of finish machining, high-speed grinding can greatly enhance grinding efficiency and ameliorate surface quality of parts. Extensive attentions have been paid to high-speed grinding by various countries. This paper concerns a high-speed cylindrical grinding machine, To improve the dynamic stiffness and to lose weight, the structures of the main components in the grinding machine is analyzed and improved.The main research content and contribution of this paper are summarized as follows:Firstly, the way to fix the bed is identified. The dynamically equivalent model of joint surface are proposed. The whole machine dynamics modal is constructed by considering the dynamical parameters of machine joints, and the dynamic force of the bed is calculated .The force is imposed to the finite element model of the bed. For the different fixed ways of bed, the bed's dynamic response analysis is calculated. Comparison study of the results has been made to determine the optimal approach to fix the bed.Secondly, a method for calculating nonlinear low frequency of grinder beds with contact boundary conditions is proposed. Taking a real grinder bed as an example, the new method has been described in detail, and its feasibility verified by comparing the nonlinear and linear frequencies. Finally, the new method is successfully applied to improve the structure of the bed.Thirdly, Grinder is consists of a number of parts, and each part's dynamic characteristics can affect that of the machine.the finite element models for kinetic analysis of the bed and headstock are established. The mode analysis is performed using the finite element software ABAQUS. The shortcoming of the original structure is explored and the structure was optimized. The optimization results show that not only the part structure is lightened reducing the costs of production, but also its rigidity is improved. The results provide the theoretical foundation for product design and improvement.