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四轴联动数控螺旋锥齿轮铣齿机的齿长曲率修正(4-axis CNC Spiral Bevel Gear Machine Tooth-profile Lengthwise Curvature Modification)
螺旋锥齿轮铣齿机 加工坐标系 轮齿接触分析
2010/12/28
常规机床对螺旋锥齿轮的齿长曲率进行修正时,需从机床上拆装铣刀盘,并重新调整其行程直径,过程繁琐。对此利用国产四轴数控铣齿机,建立铣齿加工坐标系,以及径向刀位、切削滚比变化多项式。用轮齿接触分析(TCA)的方法,以被加工齿面的接触路径、传动误差作为评价目标,研究径向刀位、切削滚比的变化对齿长曲率修正的规律。TCA分析及铣齿实验结果表明,不改变铣刀盘直径,即可实现对齿长曲率的修正,同时可更加灵活地控制...
The Effect of Soil Profile Depth on Fallow Efficiency Under Ankara Conditions
Fallow efficiency profile depth nitrogen fertilization
2009/1/14
The aim of this study was to compare the fallow efficiencies of shallow and deep soil profiles and to examine the effects of nitrogen fertilization on the grain yields in continuous wheat and fallow-w...