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| 題名: | 切屑流動方向之研究
A Study On Chip Flow Direction |
| 作者: | 劉振興 |
| 貢獻者: | 精密機械與製造科技研究所 |
| 日期: | 2011-07
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| 上傳時間: | 2013-11-19T08:28:36Z
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| 摘要: | 本研究旨瞭解金屬的切削加工中的切屑流動方向。若能瞭解切屑流動機制，對切屑控制的設計和製造切屑槽有很大的幫助。切屑控制技術是現代先進機械製造系統中的基礎關鍵技術，切屑控制技術不解決，任何一個理想的自動化過程都不能實現。在現代加工中切屑控制逐漸變得重要,有效的切屑折斷與去除是切屑控制的兩項根本任務。之前人們試圖設計各種合適的刀具,用在加工中對產生的切屑施加外力,導致切屑產生捲曲從而產生折斷,卷屑槽和斷屑台是兩種最重要的使切屑產生捲曲的方法,但是他們一直是使用實驗方法。切屑控制仍然是各種加工特別是連續的車削加工方式的一大難題,因此對切屑流動、捲曲和折斷機理進行深入的研究顯得十分必要。
本研究以S55C鋼材在不同的刀具及加工條件下，進行斜切削加工，直接量測切屑流動角及利用切削動力計所量測之數據，作為設計切屑斷屑器裝置之依據。研究結果發現作用在刀具斜面的力不能決定切屑流動角且切屑流動角隨著進刀量之增加而角度變大。而切屑流動角隨著刀具主切刃角改變而改變，且切屑流動角與刀具斜角無關，但與進刀量，切削速度有關。
The study aims to explore the direction of chip flow in metal cutting. It is crucial to realize the chip flow mechanism for chip-control and cutting grooves during the process of design and manufacture. Chip controlling is the pivotal technique in the modern advanced mechanical manufacture system. If the problems of chip controlling are not solved, none of the perfect automation process can realize .The need for chip control is increasingly important in model machining processes. Effective chip breaking and effective chip disposal are the two functional elements of chip control. There have been numerous attempts to design various appropriate chip forming tools for forming the chip with a forced curvature in it, so as to facilitate the subsequent breaking of the chip by a mechanical action. Groove and obstruction type chip formers are the two most important parts used to curl the chip. Despite the wide range of tools available to reasonably control chip formation and curl, there still seems to be non-scientific with "try and see" methods being used. Chip control still remains a problem in machining processes, especially in continuously machining such as turning. Therefore, there is a fundamental need for further research on the mechanism of chip flow, chip curl and chip breaking.
In this study, under the control of different cutting tools and cutting conditions the turning of S55C steel undertakes oblique cutting . According to chip flow angles and some of the collected data produced by the dynamometer, advantageous reference will be set down to install chip breakers. The study finds out that the force adding to chip flow angle doesn’t rest with chip flow angle. Moreover, chip flow angle will become larger while feed quantity is increasing. Additionally, chip flow angle will change as the main cutting edge angle of the tool changes. Chip flow angle has nothing to do with tool rake angle, but has relation with feed quantity and chipping speed. |
| 描述: | 指導教授:江明宗 |
| 顯示於類別: | [機械工程系(含精密機械與製造科技碩士班)] 學位論文
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