High-speed Chuck Structural Optimization And Its Application Research

High-speed machining is a multi-disciplinary technology, involving information technology, mechanics of materials and mechanical engineering. Due to the unique advantages, high-speed machining is widely applied to auto industry, electronics manufacturing, die manufacturing and so on. To achieve high-speed machining, tooling system for high-speed machining must have excellent properties. Meanwhile, as part of the coupling, connecting tool and shank, high-speed chuck is important in tooling system for high-speed machining. High-speed chuck working and clamping performance have a critical impact on the success of high-speed machining.Based on stress concentration problem caused by high-speed chuck irrational structure and evaluation of chuck and tool connection performance, this research analyzes high-speed chuck performance and clamping performance by mechanical analysis, finite element simulation and related experiments. In this study, the main work and conclusions are as follows:(1) Establish high-speed hydraulic chuck and tool contact model. By studying, it is found that high-speed chuck has uneven contact stress distribution and stress concentration problems. Based on optimization methods, arc transition line is applied to hydraulic chuck oil cavity and structural dimension values are changed. As a result, the optimization mathematical model of the chuck could be obtained.(2) Establishing the parametric contact model of high-speed hydraulic chuck and tool,utilizing finite element module and choosing optimization method to optimize chuck structure, then chuck optimization sequence could be achieved. Select the optimal design parameters to evaluate optimization effect by comparing chuck performance and service life before and after optimization. The result shows that the performance and fatigue life of optimized chuck is guaranteed and improved significantly.(3) Construct high-speed collet chuck / tool mechanics and finite element model. Based on analysis, collet chuck main failure modes are determined. Collet chuck reliability and reliability sensitivity are obtained as well. Analyze the influences of high-speed collet chuck/ tool contact model various parameters on chuck coupling reliability. Meanwhile, relevantrecommendations and measures are provided for collet chuck design, manufacturing and application.(4) On the basis of high-speed thermal loading and hydraulic chuck research,high-speed collet chuck contact mechanical properties are discussed. By experimenting, the dynamic performance advantages and disadvantages of tooling systems with different chucks are analyzed. At the same time, other performances of different chucks are also compared. With the help of comprehensive evaluation of different chucks, the basis is provided for high-speed chuck selection.