COMB FOR CUTTING MULTISTART THREADS Russian patent published in 2003 - IPC

FIELD: cutting processes and equipment, namely cutting accurate inner and outer multistart threads, mainly double-start threads. SUBSTANCE: comb has inlet portion and sizing portion with shape of their teeth in direction from inlet portion to sizing portion almost the same as that of indentations of worked thread; in order to enhance accuracy and efficiency of working, arranging cutting teeth along length of inlet and sizing portions by successive sets in such a way that length of each set of teeth is equal to pitch of worked thread; changing shape of cutting teeth from one set to another in such a way that in each set quantity of cutting teeth is equal to number of thread starts of worked thread and all teeth of set have the same shape and they are all mutually spaced by distance equal to thread pitch value. EFFECT: enhanced accuracy of working with increased efficiency. 1 dwg