高速車削之刀具溫度分析

Analysis of the cutting temperature in High Speed Machining

林時銘(Lin, Shihming)

指導教授 ： 姜庭隆

國立屏東科技大學/工學院/機械工程系所/碩士(2014年)

https://doi.org/10.6346/NPUST.2014.00148

摘要

本研究的目標是利用電腦數值模擬方法，即所謂的計算流體動力學方式(Computational Fluid Dynamics)，藉由數值方法求解多維度的偏微分統御方程式(multi-dimensional partial differential governing equations)能夠精確有效的預測複雜的並具有流體、熱傳與質量傳輸混合之流動現象。以Gambit(2.4.6版)軟體建構出車削刀具之模型與網格，其中並模擬劃分出切削時與工件接觸部位區域，以求能更真實呈現切削接觸區的熱源溫度場資料。再利用泛用型計算流體力學商用軟體Fluent(13.1版)，進行溫度場之分析，包含輻射與對流兩種傳熱效應，得到在車削時刀具-工件接觸區域範圍的溫度分佈資料。

研究方法與內容為，將以乾切削與MQL切削2種方式做分析，當中對於一些未知參數，如車削時刀具-工件接觸區域範圍的熱通量、使用MQL切削時區域的對流傳導係數、輻射率等將以模擬假設參數方式配合田口法直交表實驗，期能找出合理之最佳參數，並與實際車削時的溫度相互比照。透過本研究，將有助於了解刀具車削時的熱傳性質與溫度，此關係著刀具使用壽命、切削液使用量等因素。日後可望做為後續類似工程分析之參考。

關鍵字

高速車削 ； 切削溫度 ； MQL切削 ； CFD ； 田口法直交表實驗

並列摘要

This research goal uses the computer value simulation method, namely the so-called computation hydrodynamics way (Computational Fluid Dynamics), solves the multi-dimensions because of the numerical method the parital differential series imperial equation (multi-dimensional partial differential governing equations) to be able the precise effective forecast complex and has the fluid, the hot biography with the quality transmission mix the phenomenon of flow.(2.4.6 edition) the software construction dispatch a vehicle the sharpener by Gambit to have the model and the grid, in which and simulates divides when the cutting with the work piece contact spot region, can really present the cutting zone of contact in order to the heat source temperature field material.Again uses exudes with computation hydromechanics commercial software Fluent (13.1 edition), carries on analysis the temperature field, contains radiates and transfers two kind of heat transfer effects, obtains when the turning the cutting tool - work piece contacts the region scope the temperature distributed material.

The research technique and the content are, will do the cutting and MQL cuts 2 ways to make the analysis, middle regarding some unknown parameters, like when turning the cutting tool - work piece will contact the region scope the heat flux, will use when the MQL cutting the region convection conductivity coefficient, the emissivity and so on simulates the supposition parameter way to coordinate Tian Koufa to be perpendicular to the table experiment, the time can discover the reasonable best parameter, and with actual turning time temperature mutually according to.Penetrates this research, will conducive toward favor time the understanding cutting tool turning hot biography nature and the temperature, this will be relating cutting tool factors and so on service life, cutting compound amount of use. Will hope to do in the future reference for the following similar project analysis.

並列關鍵字

High speed Machining ； Cutter temperature ； MQL cutting ； CFD ； Taguchi orthogonal array experiment

參考文獻

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