傳統機械式沖床大多以等轉速馬達作為輸入，透過傳動載具以達到沖壓加工之效果，雖有良好加工精度與效率，卻存在加工型態無法調整的缺點；伺服沖床可彈性調整沖床加工型態，並且具有良好的加工精度與效率。本研究針對滾珠螺桿式伺服沖床，透過變轉速輸入設計，探討從動件加工之運動與動力特性，藉此改善伺服沖床不同型態加工之運動與動力特性。
首先介紹伺服沖床機構，並且進行理論推導及轉速軌跡函數之定義；接著，透過傅立葉級數作為輸入轉速曲線，針對不同伺服沖床加工型態進行實例設計，求得適合伺服沖床之加工特性；並且，透過多個目標函數之建立，探討運動與動力特性之整合設計，藉此同時降低運動與動力之不良特性；最後，使用ADAMS軟體進行機構模擬與分析，驗證本研究設計分析之正確性。
由設計結果發現，透過傅立葉級數進行變轉速設計時，其運動或動力特性皆有顯著之改善或更符合限制條件之建立，並且使得運動與動力整合設計之結果皆有改善，因此使用此方法進行變轉速設計可改善伺服沖床之加工特性。本研究所設計變轉速螺桿式伺服沖床之結果與ADAMS分析結果吻合，確立本研究設計之正確性。

A traditional press machine uses a constant-speed motor as the input source, and the input is transmitted through a transmission mechanism to achieve a desire working process. Despite good precision and high efficiency, there are disadvantages of a traditional press machine, e.g., the type of processing is unable to adjust. For a press machine using a server-motor as the input, it has the flexibility of adjusting processing type and maintains good precession and high efficiency at the same time. The kinematic and dynamic characteristics of the processing follower of a ball-screw server-motor pressing machine is discussed under various input speeds. The objective of this work is to improve the characteristics of the machine under various input speeds.
Server-motor machines are firstly introduced. And, the theoretical formulation and the definition of trajectory function are presented. The Fourier series function is then used to design the trajectory function of existing designs under different working types. The kinematic and dynamic characteristics are treated separately as the objective function and their characteristics are obtained. The integration design of both improving the kinematic and dynamic characteristics are obtained by using multi-objective function method. The results are verified by the simulation of the engineering software ADAMS.
By designing the trajectory function of input velocity with Fourier series function, the kinematic and dynamic characteristics are greatly improved or are closer to the region of design constraints. As a result, the characteristics of the server-motor press machine are improved by using the proposed variable-speed design method. And, the analytical result of the variable-speed ball-screw server-motor press machine coincides with the result of ADAMS. This proves the correctness of the design results.

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