CPC B23B 27/065 (2013.01) [B23G 5/00 (2013.01); B23G 2200/10 (2013.01); B23G 2200/24 (2013.01)] | 15 Claims |
1. A thread cutting insert for cutting threads, the thread cutting insert comprising:
a rake face of the thread cutting insert;
a plurality of cutting teeth disposed along a cutting portion, at least two of said cutting teeth having shapes differing from each other;
allocated chip formers each associated with a respective one of said plurality of cutting teeth, said chip formers being provided on said rake face;
said allocated chip former associated with at least one of said cutting teeth along said cutting portion having a shape adapted to a shape of one of said cutting teeth which, with respect to an order of engagement during a cutting operation, precedes a subsequent cutting tooth along said cutting portion such that said at least one chip former has a shape adapted to a cross-section of chips encountered by it;
said chip former extending with a variable radial chip former distance with respect to a cutting edge, in an imaginary superposition of all foregoing cutting edges with an actual cutting tooth, said imaginary superposition of cutting edges forming an envelope;
a radial cutting edge distance being definable as a radial distance between said envelope of said imaginary superposition of foregoing cutting edges and said cutting edge of an actual cutting tooth; and
at least a portion of said chip former being parallel to a regression line, said regression line representing a linear approximation of a course of a total insert-side boundary of a chip to be created by said actual cutting tooth.
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