Study of 6061 Aluminum Alloy Thread Turning

6061鋁合金螺紋車削之研究

陳狄成(Dyi-Cheng Chen) ； 尤麒熊(Ci-Syong You) ； 游沐蓉(Mu-Jung Yu)

《中國機械工程學刊》 38卷1期 (2017/02) Pp. 33-40

摘要

In this study, common threads were used to conduct a finite element analysis construction of a 6061 aluminum alloy thread turning simulation. Turning the screw speed changes planned as cutting process parameters, the cutting conditions combinations of three groups. Thread turning chip formation was analyzed under conditions such as effective stress, effective strain, cutting temperature, and thread turning abrasion changes. The thread turning machining parameters affect the interaction between the roles of impact between the parameters can be based on improving the structural design of thread cutting tools. The results show that (1) the temperature of the tip region increased rapidly with processing time, and that tool cutting fluid should be added to prevent overheating; (2) the cumulative wear depth of abrasion is in the thread cutter tip portion; (3) the maximum effective strain in contact with the tool surface; and (4) the maximum effective stress concentrated in the contact region of thread cutter tip and the workpiece, thread chip due to contact with the bottom of the tool stress caused by the bending phenomenon.

關鍵字

Aluminum alloy ； Thread turning ； Effective strain

並列摘要

本文以有限元素分析建構6061鋁合金螺紋車削模擬，種類為普通螺紋。規劃車削螺紋之轉速變化作為切削製程參數，共3組切削條件組合。分析和探討車削螺紋條件下的切屑形成、等效應力、切削溫度、螺紋車刀磨耗的變化。並全面考慮螺紋車刀切削加工參數之間的相互影響作用，能依據參數之間的影響改善螺紋車刀切削之結構設計。結果顯示(1)轉速越高其螺紋刀之溫度隨之變高，其最高溫度位置在於刀尖區域，切削時須加切削液避免其刀具過熱。(2)累積之深磨耗在於螺紋車刀尖端部位。(3)最大的等效應變在刀具接觸表面。(4)等效應力最大值集中在螺紋刀具尖端與工件的接觸區域，其螺紋底部因與切屑接觸產生應力造成彎曲之現象。