
文章编号:10062971(2012)03003903
使用维修
内旋风包络铣削双头螺杆刀具轨迹的计算方法陈欣,李海培
(沈阳工业大学,辽宁沈阳110870)
摘要:在对内旋风铣削原理和空间螺旋曲线特性了解的基础上,用旋风铣制的方法加工双头螺杆的的刀具轨遗进行计算研究。首先建立刀盘的的数学模型,算出内铣刀盘上任意一点的空间坐标,再求出这个点的运动机迹方程。同时电可以得到内镜刀盘在垂直于轴向的任一平面内的轨方程,即螺杆的轴向裁面廉形方程。再利用VisualC++软件编写相应程序求
出实验数据,并得到具有一定形状的双头螺杆的横截面廊形,分析它的特性得出相应的合理结论。关键调:螺旋线;旋风镜削;双头螺杆;航迹方程
中图分类号:TH455
文献标志码:A
Calculating Method for Trochoid of Whirlwind Cutter Milling Tool for Double-edged Screw CHEN Xin, LI Hai-pei
(Shenyang University of Technology, Shenyang 110870, China)
Abstract: On the basis of understanding the knowledge of the principle of whirlwind cutter milling technology and the characteristics of spatial helical curve, the trochoid of whirlwind discal carbide tool which can be used for machining the double-edged screw is cal-culated and studied in this paper. Firstly,build the mathematical model of whirlwind discal carbide tool, and figure out spatial coor-dinates at random point in whirlwind discal, then calculate motion trajectory equation of this point. Meanwhile, the trajectory equation of whirlwind discal in any plane perpendicular to axial direction can also be obtained,that is axial cross-section profile equation of screw. Then obtain the experiment data by using VC++ program and the cross-section profile of double-edged screw with particular
shape. Finally , analyze its charateristics and obtain corresponding logical conclusions. Key words: helical line ; whirlwind cutter milling;double-edged screw;trajectory equation
引信言 1
随着我国工业的迅速发展,螺杆泵、螺杆压缩机以及螺杆挤出机等螺旋机械,由于其优越的性能,在石油、化工、军工等很多行业得到了广泛应用。螺杆作为螺旋机械的重要部件,其制造方法和性能直接影响螺旋机械的性能。螺杆的加工方法主要分为外包络铣削方法和内旋风铣方法2 种,在国内用旋风铣方法只能加工单头螺杆,而两头及两头以上的螺杆只能采用外包络铣削的方法进行加工,该方法对两头螺杆的加工由于切削量较大,效率较低。用旋风铣削的方法螺杆的主要优点是加工精度高,加工完的工件表面质量高,
热变形量小,加工效率高等。收稿日期:2011-12-17
圆柱螺旋线的形成原理 2
当一动点A沿着导圆柱的母线作等速直线运动,同时该母线又绕圆柱面轴线作等角速回转运动,其直线速度与角速度@成正比,点4的运动轨迹称为圆柱螺旋线。圆柱螺旋线的基本要素有:
(b)导程P动点A绕圆柱
(a)导圆柱面的直径D。(
面回转一周沿轴向移动的距离:(c)旋向螺旋线的旋转方向有右旋及左旋之分:其坐标式参数方程为
X=a cos cot
Ya sin ot Z=b @t
(8+>1>8-)
(1)
其中t为时间参数,b=/w,a为导圆柱的半径同时也是螺旋线在x轴上的起始点的坐标值。
压爆机技术[39 Compre