Importance

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Abstract

A method of forming milled tooth of variable tooth worm (VTW),comprising: coupling a workpiece of worm with a coordinate system {.sigma..sub.1(.phi..sub.1)[O.sub.1; {overscore (i)}.sub.1(.phi..sub.1), {overscore (j)}.sub.1(.phi..sub.1), {overscore (k)}.sub.1(.phi..sub.1)]} on the CNC multi-axes simultaneously coupled machine tool, in which the workpiece of worm is rotated with the angular speed .omega..sub.1 around the axis of {overscore (k)}.sub.1(.phi..sub.1); coupling a milling-cutter with another coordinate system {.sigma..sub.2(.phi..sub.2)[O.sub.2; {overscore (i)}.sub.2(.phi..sub.2), {overscore (j)}.sub.2(.phi..sub.2), {overscore (k)}.sub.2(.phi..sub.2)]} on the CNC multi-axes simultaneously coupled machine tool, in which the milling-cutter is rotated with angular speed .omega..sub.2 around the axis of {overscore (k)}.sub.2(.phi..sub.2)-, and .omega..sub.1/.omega..sub.2=i and i is constant; feeding the milling-cutter to move along {overscore (i)}.sub.2(O.sub.2) axis in the radial direction and simultaneously rotate around {overscore (k)}.sub.2(.phi..sub.2) in the circumference direction, the coordinates of edge of milling-cutter is according to the following equations: X.sub.2=u, Y.sub.2=r.sub.b-.nu. sin .beta., Z.sub.2=.nu. cos .beta..

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First Claim