Figure 1. Analysis of Cutting Movement


As shown in figure 1, according to above motion rela1tionship, chord of face circular 

milling cutters rotate with angular velocity ω(b) following plane Q. When generation line is 

in line segment WV, the chord cut in small end of bevel gear. When the chord moves to W1, 

it shows that the cutter will cut into root cone, and the overcut will happen. Tool edge 

rotates following Q. Meanwhile, it moves along chord direction. So the motion direction of 

the tool edge is along line segment OW’ in order to avoid overcut. Because circular milling 

cutters rotate with angular velocity ω(b) the velocity of perpendicular to line OW direction 



As shown in figure 2, circular milling cutters which is selected feature simple  structure. Main cutting edge of milling cutters is in the same plane and the plane is vertical  to tool shaft. The main cutting edge in high speed rotation form rotary plane Σ, chord WV in  which can be as generation line to realize motion of tooth surface generation.

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