行星式三輥輪高縮減壓延(Three-Roll Planetary High Reduction Mill)僅需單一道次即可產生相當於傳統壓延6~8道次，在斷面棒材的縮減製程上具有低壓延道次、降低設備成本、縮短生產時程等優點，適合高品質特殊鋼之壓延；然而此高縮減壓延製程複雜，參數的設定對製程品質有相當大的影響，於實際生產線上仍有許多製程缺陷待需解決，如打滑、螺旋紋、斷尾…等現象。若能掌握製程特性並防止缺陷的發生，將會提高生產速率及競爭優勢。
　　本文利用有限元素套裝軟體DEFORM-3D分析高縮減壓延製程中重要的參數，針對壓延不銹鋼棒材時之打滑現象，建立高減縮壓延機製程之有限元素分析模式，分析不同偏離角及摩擦因子下，對於壓延製程的影響性。由模擬之結果顯示，不同偏離角下，摩擦因子與輥輪負荷、輥輪扭矩於胚料軸向出口速度的關係，並可以觀察出胚料於壓延過程中，應力與應變的變化情形，以上之結果可作為高縮減壓延製程參數設定之依據。
　　將本文模式所得之結果，配合實際高縮減壓延製程可量測之數據，可應用於壓延時摩擦因子的獲得，並預測出壓延是否會打滑。

　The three-roll planetary high reduction mill process has the capability of six to eight times reduction rate of the traditional rolling process. This capability has the advantages of less pass, low cost, and reduced production time and this is suitable for high quality rolling of steel. However the characteristics of high reduction rate makes the process to be complex and it is difficult to control the process parameters. In order to prevent process failures, such as slipping, spiral mark, and crack on billet, the process parameters must be set up correctly.
　The commercial DEFORM-3D package is used in this research to analyze the important process parameters of high reduction mill. The finite element model is focused on the simulation of slipping phenomenon. Effects of different offset angles and friction factors were analyzed to construct the framework of process parameter. The simulation reveals the relation between offset angle, friction factor, rolling force, rolling torque and outlet velocity. Stress and strain distributions of material during the process are also shown and helpful for selecting parameter of high reduction mill.
　If the results of simulation are combined with measured data in the rolling mill, the friction factor during rolling can be obtained and the slipping can be predicted.

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