Patent ID: 7044691
Filing Date: 2006-05-16
Classification: B23F,Y10T

Abstract:
1. A forming method for milling teeth of variable tooth worms, comprising the following steps: on a multi-axis simultaneously-working CNC machine-tool, a first moving coordinate system {σ where, u, v are the parameters of a generatrix plane Σ of the variable tooth worms tangent to an imaginary cone; β is the inclination angle of the generatrix plane Σ relative to the axis of the imaginary cone; r b is the radius of the main basic circle of the cutter body; x 2 , y 2 , z 2 are the coordinate values of the cutting edge on the generatrix plane, in which when the center distance between the worm blank and the milling-cutter is from 80 mm to 500 mm, the value of u is from 51 to 378, the value of v is from ±19.4 to ±122, and the value of r b is from 19 mm to 173 mm; and βis greater than 0° and less than or equal to 30°; and shifting of a cutting edge of the cutter on the inclined generatrix plane in spatial locations about the milling cutter forms a cutter that will form the tooth flank of the variable tooth worms in the worm blank.