US 11,684,980 B2
Thread cutting insert
Sylvain Arjona, Mamer (LU); Fabien Axer, Mamer (LU); and Marc Noel
Assigned to CERATIZIT Luxembourg S.A.R.L., Mamer (LU)
Appl. No. 17/252,561
Filed by CERATIZIT LUXEMBOURG S.A.R.L., Mamer (LU)
PCT Filed May 13, 2019, PCT No. PCT/EP2019/062130
§ 371(c)(1), (2) Date Dec. 15, 2020,
PCT Pub. No. WO2019/238323, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 8177900 (EP), filed on Jun. 15, 2018.
Prior Publication US 2021/0252603 A1, Aug. 19, 2021
Int. Cl. B23B 27/06 (2006.01); B23G 5/00 (2006.01)
CPC B23B 27/065 (2013.01) [B23G 5/00 (2013.01); B23G 2200/10 (2013.01); B23G 2200/24 (2013.01)] 15 Claims
OG exemplary drawing
 
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.