漸開線正齒輪之彈性製造新技術

A NEW FLEXIBLE MANUFACTURE TECHNIQUE FOR INVOLUTE SPUR GEARS

齒輪設計及製造時考量的因素有很多，例如有傳動速比、噪音及強度等，設計者可因不同的需求而決定壓力角、轉位系數、齒尖修正(tip modification)或齒根導圓角等。若在少量多樣的製造要求下，基於成本考量，製造者不可能為了少量多樣的生產，而訂購不同的加工齒刀及購置專用齒輪製造機器，因一把齒刀都極為昂貴；本文利用CAD／CAM方法結合一般的CNC加工切削中心及刀具，自行發展一套新的彈性製造新技術，輕易達到少量多樣的設計及製造需求，因而提升少量多樣的齒輪設計及製造效率，並減低成本。

Many factors such as transmission ratio, noise and strength are considered in gear designs. According to need, gear designers determine pressure angle, long and short addendum, root fillet and tip modification. For production of small-lot but diverse-design gear production, it is impossible for gear manufacturers to purchase various gear cutting tools and gear production machines based on cost considerations. Even a single cutting tool is very expensive. In this paper, CAD/CAM methods combined with a CNC machine center and ordinary cutting tools were employed to develop a new flexible manufacturing technique to meet the demands of small-lot but diverse-design gear production. Using this new technique increases the efficiency of small-lot but diverse-design gear production and reduces the cost of gear production.