Apparatus for centering and blocking of a workpiece for the purpose of honing by means of an expandable honing tool

摘要

Device for centering and locking of a part (1) with a view to its lapping, comprising a support (10) in order to apply the part (1) against a fixed stop (3), a first piston (7) with a large stroke and a second piston (8) with a reduced travel interposed between the support (10) and the first piston (7), the means preventing - rotation (18) for the part (1), a locking element (12) for blocking at will the first piston (7) with respect to its cylinder (6), and a command for, in succession, & br / a) - the two pistons (7, 8) in order to lock the part (1), & br / b) - blocking the first piston (7) with respect to its cylinder (6) by the locking element (12), & br / c) - push the second piston (8) in order to unlock the part (1), & br / d) - inserting the lap in the part (1) is immobilized by the means preventing - rotation (18) and, in the driving in rotation, to be expanded, the lap to the establishment of a predetermined torque between the lap and the part (1) and & br / e) - advance the second piston (8) to relock the part (1). br / application: in particular for bedding-in of pinions for gear boxes.