Analysis of Clamping Force and Contact Pressure of the High Speed Spindle

[[abstract]]本文對高速主軸拉刀機構進行尺寸設計之靜態分析與動態分析，使用機器鋼(tooling steel)模擬高速主軸(HSK-Clamping-Unit/Form 63F)的軸心(drawbar shaft)、拉刀錐(clamping cone)、刀爪(gripper)與刀柄(hollo-shaft-taper)部份。當刀爪受到拉刀錐拉力影響向外擴張抓住刀柄時，所承受的應力，使用有限元素分析及軟體“ANSYS”設計機構，並使用接觸分析，驗證結構尺寸設計在有設定接觸元素的影響下，有效改善機構的受力關係，及動態特性。接觸分析屬於非線性問題，靜態分析於結構內施加壓力，觀察結構受壓力影響產生之變形與應力。在轉速高達一萬轉，並考慮不同摩擦力的影響下，機構所能承受的壓力，並根據不同的機構尺寸之靜態、動態與應力分析所產生的結果，進行結構上的改善，使刀爪與刀柄有更好的結合剛性。[[abstract]]In this thesis, the dynamic analysis and static analysis are investigated to design for the dimension of high speed spindle system HSK -Clamping-Unit/Form 63F which the tooling steel are utilized to model the drawbar shaft、clamping cone、gripper、and hollow-shaft-taper parts. When the clamping cone force the gripper expends to clamp the hollow-shaft-taper generate the pressure which use Finite Element Analysis, “ANSYS”, design the clamping system. Contact analysis to verify the measurements by the contact element affect the pressure of the system and dynamic characteristic. Contact analysis is nonlinear equation which pushes the pressure to the static structural. Observing the structural affected by the pressure to result the deformed shape and moment. When the spindle under the rotational speed over 120000 rpm, consider result of static, dynamic and pressure analysis different design of the contact area. Therefore, getting better clamping force by change the structural of the clamping system