Research And Optimization Of Spindle System Characteristics Of Superhard Tool Grinder Based On Finite Element Method

Machine tool industry has a direct impact on the realization of the equipment automation and manufacturing automation for each industrial sector of the country, its development level is the important indicator of comprehensive national strength. Super-hard cutting tool grinding machine is a kind of machine tool.The static and dynamic performances of the spindle system have an effect on the machining accuracy when the grinding machine at work. So the static and dynamic performance analysis of grinder spindle system in the design has an important position. Adopt the finite element method on the characteristic analysis of main shaft system; explore the strain and forced vibration problem in the process of high speed grinding; carry out the optimization design can improve the design level of spindle, shorten the design time, reduce the cost, and has important practical significance on improving the performance of grinding machine. In this paper, the specific grinding machine made in Jingcheng machine tool Co. was the research object. Carry out the performance analysis and optimization design of the spindle system in order to improve the static and dynamic characteristics of the spindle and improve the grinding machine processing performance by using ANSYS software.1. Establish the entity model of the spindle system by using Solid Works software according to the structural parameters and the actual working environment of the grinder spindle. Import this model into ANSYS software; determine the load and constraint conditions of the spindle, selected element type, carry out the mesh generation, so accurate finite element model of the grinder spindle system is established.2. Select two kinds of working condition of the grinder spindle; carry out the statics analysis, modal analysis and harmonic response analysis for the main shaft system by finite element method. Be aware of the location of the maximum deformation, the static stiffness, natural frequency and harmonic response peak. Comparing the performance of the main shaft system under different working conditions, and thus found the design weaknesses.3. Establish the parameterized finite element model of the spindle system by using the APDL of ANSYS. Accomplish the optimization design of the spindle system by using the optimization tool of ANSYS; as a result, the spindle is lighter, the stiffness has been improved, the natural frequency value is increased, and gets better static and dynamic performance.The research results provide the basis for the static and dynamic design of machine tool spindle system, shorten the design cycle and improve the design efficiency.