Method and system for centering a workpiece on the central axis of a cylindrical bore

摘要

A method for centering a work piece on the central axis of a cylindrical bore 100 in a body, the work piece including a rod, the method comprising: (a) inserting into an end of the bore 100 an arbor 300 having a cylindrical exterior surface matingly slidable within the cylindrical bore 100, the arbor 300 having a symmetrical reference pin protruding from an end of the arbor 300 coaxially with the central axis; (b) sensing the position of the reference pin in a plane transverse to the central axis and transmitting pin position data to a computer system 400; (c) computing a center of the reference pin from the pin position data and representing the reference pin center as a bore 100 axis target; (d) removing the arbor 300 from the bore 100 and inserting the work piece into the bore 100 with the rod protruding from the end of the bore 100; (e) sensing the position of the rod in the plane traverse to the central axis and transmitting rod position data to the computer system 400; (f) computing a center of the rod from the rod position data and representing the rod center as a rod target; and (g) adjusting the position of the rod to bring the rod target substantially coincident with the bore 100 axis target.