DEFORMING-CUTTING BROACH Russian patent published in 2010 - IPC B23D43/02 

FIELD: technological processes.

SUBSTANCE: broach comprises serially installed deforming, cutting and smoothening elements with taper leads and back tapers with angles of taper leads accordingly to deforming and smoothening elements. In order to increase accuracy and efficiency of processing, broach is equipped with tailpiece arranged at back side of cutting teeth coaxially to longitudinal axis of broach. Taper lead may be arranged by minimum size of deviation from geometrical shape, pitch of identical aligning and cutting elements may be arranged as less then length of processed hole. Broach may be equipped with aligning elements in number of at least 2 with diametre equal to cutting elements, and one guide element, besides number of cutting elements may be selected as equal to at least 4, and each cutting element is arranged as exceeding size of the previous one by 0.01 of diametre, and subsequent smoothening elements may be arranged as per maximum permitted size of processed hole in number of at least 2.

EFFECT: improved accuracy and efficiency of processing.

3 cl, 1 dwg