汽車用轉向軸旋鍛製程優化之研究

The Study of Swaging Process Optimization of Automobile Steering Shaft

許孟軒(Meng-Hsuan Hsu)

指導教授 ： 韓麗龍

國立臺北科技大學/機電學院/機電整合研究所/碩士(2013年)

摘要

汽車用轉向軸(shaft)於旋鍛成形(swaging)製程後，常無法順利與對手件組立，同時旋鍛內齒芯棒的壽命過短。本研究利用田口方法，分兩階段改善轉向軸組立不順的問題，並提高芯棒的壽命。第一階段使用L9直交表，第二階段使用L18直交表，有系統的變更製程參數，如：打擊方式、送料速度(液壓流量控制閥)、外徑尺寸、模具型式、停留時間、主軸轉速與止退壓力。實驗方法是以旋鍛機實際鍛打試片，進行品質特性量測與製程參數優化。研究結果顯示，影響變異顯著因子為打擊方式、送料速度、模具型式與停留時間，優化參數為打擊方式設定為推打、送料速度設定在刻度1(約2.5 mm /sec)、模具型式使用A-Type、停留時間設定為0.15秒；經由優化製程參數之後，可以有效改善轉向軸的組立問題，並使內齒芯棒壽命提升132.5 %，同時減少試模時間。

關鍵字

轉向軸 ； 旋鍛成形 ； 田口方法 ； 製程優化

並列摘要

After the swaging process, steering shaft of auto mobile cannot be easily fabricated with the match pieces, and the life of the spline shaft is too short. In the study, we use Taguchi methods through improving steering shaft fabricating and extending the life of the spline shaft in two stages. First, it applied L9 orthogonal array. Second, it applied L18 orthogonal array systematically to change the process parameters, for example, the swaging modes, the Feeding speed, the diameter size, the mold type, the retention period, the spindle speed, and the preventing return pressure, In the experiment, the way is experimenting by the swaging machine to measure quality characteristics and optimize the parameter. The result shows that the significant factors were the swaging modes, the feeding speed, the mold type, and the retention period. Through optimizing the parameter, it is effective to improve the shaft match problem, life up the spline shaft for 132.5 %, and save the mold testing time.

並列關鍵字

Steering shaft ； swaging ； Taguchi methods ； Process Optimization

參考文獻

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