Rebuilding worn hammer mill hammers

Details Rebuilding worn hammer mill hammers Rebuilding worn hammer mill hammers

1988-04-21

1989-08-15

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Repairing

295273, 295274, 295276, B23P 1502

Patent

active

048561703

ABSTRACT:
In a hammer mill, such as used for pulverizing coal, or breaking and grinding scrap metal, rock, masonry, refuse and the like, the hammers are exposed to wear. In time, a part of the wearing surface of the hammer is worn away and the hammer becomes less effective. A worn hammer is returned to its original weight and dimensions by depositing a molten exothermic material on the worn surface. The worn hammer is supported and enclosed by a mold so that the worn surface faces upwardly. The exothermic material is ignited and flows into the mold chamber into contact with the worn surface until the desired hammer dimensions and weight are achieved. Excess exothermic material overflows from the mold chamber into a sump. The exothermic material deposits a weld on the worn surface of the hammer which is similar to Ni-Hard, a known wear resistant metal.

REFERENCES:
patent: 3349463 (1967-10-01), Kittelson
patent: 4563801 (1988-01-01), Schill et al.

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