HAMMER MILL DISC REFURBISHMENT PROCESS AND APPARATUS

摘要

A method and apparatus for a hammer mill's worn discs. The disc can be refurbished by removing a peripheral portion of the disc and placing a ring on the peripheral rim left on the disc. The ring preferably has a tapered, radially inwardly facing surface that abuts the peripheral rim of the disc to form annular gaps on both sides of the disc/ring junction. Molten metal, such as during a welding process, is placed in the annular gaps to form annular beads that mount the ring to the disc effectively as if the ring, beads and disc were one integral piece. The disc/ring combination is preferably heat-treated to metallurgically improve the disc in order to prepare the disc's peripheral edge, which is made up of the ring, for impacts during use.

主权项

1. A method of refurbishing a first hammer mill disc that is mounted to a driveshaft adjacent a plurality of hammer mill discs to form a rotor body, the method comprising:
(a) removing the first disc from the driveshaft; (b) removing an outer periphery of the first disc to form a peripheral rim having a defined radius from an axis of rotation of the first disc; (c) disposing a ring formed of a single piece of metal, the ring having a radially inwardly facing surface and a radially outwardly facing surface, with the radially inwardly facing surface of the ring abutting the peripheral rim of the first disc; (d) welding the ring's radially inwardly facing surface to the peripheral rim; (e) mounting the first disc to the driveshaft; and (f) rotating the driveshaft and causing objects to impact at least the radially outwardly facing surface of the ring that is welded to the first disc.