本文的主要目的，在於利用一套系統化的設計方法，來設計新型螺栓成型機可調行程之後通出機構。文中，首先分析現有螺栓成型機之後通出機構的構造與運動特性，進而歸納出後通出機構的設計需求與設計限制；接著，根據後通出機構的設計需求，利用創意性機構設計方法，合成可行的四連桿及六連桿後通出機構構造；再以功能分解的方法，找出各子系統的可行構想，並加以整合，共評比得到二個新型機構構想；最後，在與原機構相同的頂出行程條件下，將評比所得的新構想進行尺度最佳設計。本文所設計的新型機構的優點，在於撞擊點的偏移量較原後通出機構小，且有效地降低所有行程中的最大撞擊速度。本研究的主要成果，為對此類螺栓成型機可調行程之後通出機構，提供一套可行的設計步驟，並提出二型改良設計。

The main purpose of the study is to design new adjustable knock-out mechanisms for a bolt former by using a systematic method. First, the design requirements and constraints are concluded from the results of the structural analysis and kinematic analysis of an existing knock-out mechanism of a bolt former. According to the design requirements of the knock-out mechanism, topological structures of the feasible knock-out mechanisms with four- and six-link are then synthesized utilizing a creative mechanism design method. By using the method of functional decomposition, all feasible designs for each subsystem are presented and then integrated. Two new designs for the adjustable knock-out mechanisms of the bolt former are obtained through the evaluation of those feasible designs. With the same knock-out stroke of the existing knock-out mechanism, the dimensions of the two new designs are then synthesized optimally. The advantages of new designs are that the maximum deviation of strike point is smaller than that of the existing knock-out mechanism and that the maximum strike velocity for all knock-out strokes is reduced effectively. The main contribution of the study is to provide the feasible design steps and two improved designs for the adjustable knock-out mechanism of a bolt former.

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