Two-piece mandrel assembly for deforming

Details Two-piece mandrel assembly for deforming Two-piece mandrel assembly for deforming

1976-04-05

1977-10-18

Moon, Charlie T.

Metal deforming

With cleaning, descaling, or lubrication of work or product

Mechanical cleaning

1510405, 29445, 29458, 29526R, 72 43, 72 46, 72392, 72476, 85 1P, 85 5R, 85 7, 151 4173, B21B 4502, B21C 4300

Patent

active

040540456

ABSTRACT:
A hole expansion mandrel assembly for expanding holes through work pieces including a drive pin with a leading pulling section and a trailing driving shoulder; and a collet removably carried on the drive pin and abutting the driving shoulder where the collet has an expansion surface to enlarge the holes as the drive pin is used to force the collet through the holes. The drive pin may incorporate a fastener trailing the collet. The method of using the apparatus is also contemplated.

REFERENCES:
patent: 349427 (1886-09-01), French
patent: 2053918 (1936-09-01), Peretzman
patent: 2185483 (1940-01-01), Ward
patent: 2402795 (1946-06-01), Wood
patent: 2459808 (1949-01-01), Geyer
patent: 2978946 (1961-04-01), Looker
patent: 3434327 (1969-03-01), Speakman
patent: 3661406 (1972-04-01), Mele
patent: 3779127 (1973-12-01), Speakman
patent: 3805578 (1974-04-01), King, Jr.
patent: 3835688 (1974-09-01), King, Jr.
patent: 3915052 (1975-10-01), Ruhl
patent: 3951561 (1976-04-01), Speakman

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