Patent ID: 6210259
Filing Date: 2001-04-03
Classification: B24B

Abstract:
A lapping assembly for lapping a group of workpieces at a predetermined cutting speed, said lapping assembly comprising:(a) first and second lapping discs, said lapping discs arranged next to one another, each said lapping disc having a working surface with abrasive particles for lapping the surfaces of the workpieces;(b) a cassette positioned between said lapping discs for holding the group of workpieces, said cassette having a curvilinear opening formed within and dimensioned to receive the group of workpieces, said opening being defined by an inner wall;(c) an oscillating assembly coupled to said lapping discs for providing two-component translational oscillations to said lapping discs in directions which are parallel to said working surfaces of said lapping discs, said translational oscillations being provided at the cutting speed of the group of workpieces; and(d) a rotational assembly coupled to at least one of said cassette and said lapping discs, such that a point on the periphery of said cassette rotates in relation to an adjacent point on at least one of said lapping disks at a linear speed which is less than said cutting speed, such that the workpieces are caused to circulate within said opening of said cassette.