CNC帶鋸床鋸切振動對鋸切效能影響研究

The Study of Sawing Performance Affected by Sawing Vibration on CNC Band Sawing Center

鍾効諺(Hsiao-Yen Chung)

指導教授 ： 魏進忠

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2014年)

摘要

帶鋸床為大型金屬切割效率最佳的工作機，其優點如材料損耗較少、材料質變低、鋸切範圍大、鋸切成本低廉……等，鋸切應用範圍非常廣泛，可使用於木材切割、石材切割、高分子材料裁切、金屬與非鐵金屬材料鋸切等，而切削不同材料鋸刀齒型與刀刃材料也有不同的對應設計，提高刀鋸切削性能與壽命。
隨著複合材料與合金技術之進步，大幅提升材料硬度，傳統高速鋼鋸帶對於現在高硬度切削材料已不敷使用，進而開始使用能達到高效率與高硬度之鎢鋼鋸帶來提升產能，鋸帶是所有刀具裡面，行徑路線最長，刀具支撐點限制較多，在鋸帶與結構上易產生振動，振動對於鎢鋼鋸刃影響甚大，影響到鎢鋼鋸帶之壽命與切削成本，所以本研究重點於解析所有造成鋸帶振動之振動源並建立鋸帶自然頻率隨鋸切條件變化之關係，找出制振方法與最佳鋸切條件，針對S45C、SUS304、SKD61三種不同性質材料進行長時間切削，得到最佳之鋸帶切削壽命。以加速規搭配量測系統擷取切削之振動數據，經快速傅利葉轉換為頻譜圖進行解析，找出鋸帶振動特性與各項激振源之影響，以得知最小鋸切振動與表面形貌之鋸切條件。

關鍵字

振動 ； 帶鋸床 ； 鎢鋼鋸帶 ； 鋸帶壽命

並列摘要

Band sawing machine is the most efficient cutter for large metal cutting , its advantages are less material loss, large cutting range, low cost..., the range of it’s sawing capability is very wide, it can be applied for timber, stone, polymer materials, metals and non-ferrous metal materials, and for each different material for cutting there is a corresponding design of the tooth saw blade and blade material to improve cutting performance and life of the saw blade.
With the advancement of composite materials and alloys technology, it greatly improves the hardness, the traditional high-speed hacksaw is no longer enough for todays high hardness cutting material , therefore has started using tungsten hacksaw to achieve high efficiency and improve productivity.Band saw having the longest of route of all blades, has more limit to it’s anchor(support point), the structure is prone to vibration, which leads to a great impact for tungsten hacksaw blade, affecting the life and cutting the cost of the hacksaw.The main purpose of this study focuses on analyzing all of the causes lead the source of the vibration, and analyze the linear relationships between the band saws natural frequency and the cutter condition, to find the damping method and the best cutter condition. Targeting the three materials S45C, SUS304, SKD61 put under a long term cutting condition to accurately measure the band saw cutting life. The method consists of of accelerating and compliance with the measurement system to capture the vibration data and the using of the fast Fourier transform to transform the data into frequency spectrogram to carry out the analyzing. Using the finding of the band saw vibrating characteristics and impact of excitation source, therefore understand the smallest band saw vibration and it’s surface cutter condition.

並列關鍵字

vibration ； band sawing machine ； tungsten hacksaw belt ； band saw life

參考文獻

13.紅番企業股份有限公司(http://www.taiwan-wikus.com.tw)。

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