Research And Analysis Of Reliability For High-speed Motorized Spindle

High-speed motored spindle is a core component of high-speed machining center. The reliability of the work has decisive influence on the life of the machining and machining accuracy. In this paper, we focus on the high-speed motored spindle of the high-speed machining center, a view on the basic methods on the reliability analysis of the high-speed motored spindle’s rigidity and resonance, and research the reliability of the high-speed motored spindle’s rigidity and resonance. The structure of the paper is as follows.(1) Through studying the high-speed spindle structure and working principle, analyzes the structural characteristics of high-speed spindle and the main failure mode.(2) Application of the three-dimensional modeling software Pro/E,create three-dimensional high-speed spindle model and application of VC++6.0software developed a three-dimensional parameters software, you can enter the size parameters, change the structure of high-speed spindle size.(3) Import the high-speed spindle model into the software ANSYS, determine the constraints and cutting loads. Through the response surface method, analysis the stiffness and vibration, calculate the reliability of high-speed spindle and some other parameters.(4) Application of ANSYS Parametric Language (APDL) to establish the key components of high speed spindle parametric model, applied probability and the finite element method In the ANSYS Probabilistic Design (PDS) module analysis the key components of reliability.(5) Virtual reliability test of flexible contact on bearing with deep ball filling slots is carried out. Numerical calculation of the contact stress is done using ANSYS and LS-DYNA separately. An actual test-bed of the No.6408bearing was designed to obtain the deformation caused under different loads. A comparison between theoretical calculation and experimental results proves the rationality of the finite element computation model. Finally a new reliability sensitivity analysis method for system random errors is expanded, which can analyze the effect of random errors on dynamic contact stress and fatigue reliability of the bearing system significantly.