HOLE MANDRELLING DEVICE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: device has two coaxially mounted pushers with drive for relative axial movement between which bilateral action broaching is placed. Drive of pushers is in the form of twin pneumatic cylinders to provide alternate functioning of pushers in basing workpieces and operative movement of broaching. Each cylinder has telescopically installed power, basing and intermediate rods. Power rod is housed in basing rod made in the form of barrel with axial hole in bottom to receive bar section of rod. Head of pusher is freely installed in inner space of barrel bounded by its bottom and face surface of power rod. Power rod has axial blind hole receiving intermediate rod. EFFECT: enhanced operating reliability. 1 dwg