SHELL BROACH Russian patent published in 1994 - IPC

FIELD: metal working. SUBSTANCE: the shell broach, containing housing 1 with a longitudinal key slot, and front guide 5 and sections of teeth 4 tightened in the axial direction by nuts 6 installed on the slot by means of hexahedral key 2, is provided with elements intended to take up the radial clearance; the elements are inclined in threaded through holes of housing 1, their spacing equals the spacing of the sections of teeth 4, and slope tgα = D/h, where D - mandrel diameter; h - spacing of tooth sections. Hexahedral key 2 has a length equal to the sum of the lengths of the set of tooth sections, front and rear guides, and its side walls are conjugated to the side surfaces of the square key slot of the housing and to the side surfaces of the trapezoidal slots of the tooth sections. The radial clearance between the side surfaces of the hexahedral key and the side surfaces of the trapezoidal slot in the tooth sections is taken up at tool assembly individually in each section. EFFECT: facilitated procedure. 4 dwg