Metal working – Method of mechanical manufacture – Repairing
Patent
1994-11-30
1995-12-05
Bryant, David P.
Metal working
Method of mechanical manufacture
Repairing
2940211, 2940214, 2940219, 408 81, B23P 600
Patent
active
054717302
ABSTRACT:
A method for restoring worn bores in a turret or other tool punch press is disclosed. The worn turret bore is refurbished by using a special boring bar and drive mechanism to enlarge the diameter of the worn section of the bore. A cylindrical sleeve is inserted into the re-bored bore and secured therein. The internal diameter of the sleeve has been machined to correspond to the unworn internal diameter of the bore. The outside diameter of the sleeve is sized to provide a slipfit with the enlarged diameter of the bore. Axial alignment of the worn turret bore is restored according to the invention by locating the boring bar along an axial centerline of an unworn region of the bore. The unworn region of the bore is the lower portion thereof and is the same diameter and in alignment with bore as originally machined. The boring bar utilizes the unworn portion of the bore as a reference when re-boring the worn portion of the bore.
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