Define Rack Cutter Generating Process?
The rack cutter generating process is also called shaping process. In this method, the generating cutter has the foam of basic rack for the gear to be generated. The cutting action is similar to a shaping machine. The cutter reciprocates rapidly and removes metals only during the cutting stroke. The blank is rotated slowly but uniformly about its axis, and between each cutting stroke of the cutter, the cutter advances along its length at a speed equal to the rolling speed of the mating pitch lines.
When the cutter and the blank have rolled distance equal to one pitch of the blank, the motion of the pitch is arrested, the cutter is withdrawn from the blank to give a relief to the cutting edge, and the cutter is returned to its starting position. The blank is next indexed and the next cut is started following the procedure. The helical gear is cuts by swiveling the cutter slide to the required helix angle. The cutter now reciprocates in a path set by the helix angle while the rotary movement of the blank discontinued.